I think the problem with THE FLASH in Season 7 is the same problem as S5 and S6: it's too slow. In Seasons 1 - 4, THE FLASH would complete in six episodes what other shows would take an entire season to do: powers were learned, secrets were revealed, identities were exposed, hidden agendas were unveilled. Season 5, however, had a new showrunner and THE FLASH spent an entire season with Barry being unable to stop one guy with a magic knife. Season 6 did something neat: it split the season into two arcs. However, the individual scripts were still extremely slow. Characters wander around; they hesitate from taking action, filibustering until a commercial break, then filibustering again until somebody gives somebody else a sappy emotional speech.
The writers are struggling to write for a speedster because a speedster demands that each episode have at least three situations that can only be solved with clever application of superspeed and the current team can come up with about ten situations per season. Superspeed is extremely hard to write and the one person who was quite good at it was also crazy abusive and rightly fired off the show and blacklisted from the industry.
I think THE FLASH needs a certain mad sci-fi inventiveness at the helm, but all the writers I can think of would not be considered by the CW or WB because they don't have any TV experience.
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BATWOMAN is in a difficult position with its fans. After Ruby Rose quit the show, the fans cried for Wallis Day, but the showrunners felt that swapping Rose for Day would be visually nonsensical and instead found a new character to wear the Batwoman costume. A few episodes into Season 2, they decided that they would recast Rose's role after all but offer an explanation for why the face was different. But even after casting Wallis Day, BATWOMAN delayed and prevaricated: she was wearing a facial covering in a cameo and then absent for several episodes, then she was wearing a wooden mask, then she had her face restored but altered to look like Wallis Day instead of Ruby Rose, then she was possessed by Circe Sionis.
It reminded me a bit of what Slider_Quinn21 once said about HEROES where Bryan Fuller delayed until nearly the end of Season 1 before having Peter and Sylar fight and then it was just flashing lights with all the action off-camera -- a warning that there wasn't really much content there with two invincible beings fighting to a stalemate.
BATWOMAN delayed having Wallis Day play Kate Kane until the Season 2 finale -- and having seen Day play the role, I can see why. The story claims that Kate is the same person as Ruby Rose but with Wallis Day's face, but Day's performance is simply wrong. Day could be a great Kate Kane, but she can't play Ruby Rose's Kate Kane. Ruby Rose's Kate was distant, troubled, secretive, withdrawn. She was uncomfortable making eye contact with Mary. She was guarded with Luke, trusting him fully as an ally but hesitant to think of him as a friend and determined to make him subordinate when Luke considered himself her boss.
In contrast, Wallis Day's Kate Kane laughs with Luke and winks at him. She unreservedly hugs Mary and touches her face sweetly. She warmly shakes Ryan Wilder's hand. This is not Ruby Rose's Kate Kane. This is a much more tactile, friendly, open, trusting presence than Ruby was at her warmest.
I suspect that BATWOMAN's writers have never had a firm grasp on Ruby Rose's Kate Kane. As originally scripted, judging from the audition pages, Kate Kane was supposed to be a sophisticated socialite, a smooth-talking high society elite who felt she didn't belong anywhere but in the US Army which had rejected her. Rose auditioned for the role and ignored Kate's scripted sauveness, making Kate Kane an angry punk girl, a seething leather-clad rocker with two angry fists and a glowering scowl as her default expression. The BATWOMAN writers seemed content to write their Kate and let Rose interpret the scripts as she saw fit.
Wallis Day's Kate seems to be the originally scripted version of Kate without Ruby Rose rewriting her dialogue and reinterpreting the words, and I recognize this as a variation on the comic book version of Kate Kane. I do not recognize it as the Ruby Rose version of Kate Kane. And I think the BATWOMAN writers also do not recognize this version of Kate Kane, don't know what to do with this version of Kate Kane -- so they sent her away on some offscreen quest.
I don't know if Wallis Day will return. If Kate could be offscreen for half a season and then come back, then Wallis' version of Kate could work as Kate having changed after her travels. But Day recently retweeted a podcast titled, "How BATWOMAN Failed Kate Kane." This would indicate that Day is not contracted for Season 3, not happy that she isn't contracted for Season 3, and not concerned about upsetting BATWOMAN's writers and showrunner with her retweet because she doesn't believe there will ever be an offer for Season 3.
I'm sad about that. But the version of Kate Kane that Ruby Rose played is gone, has been since Rose left the show, and she can never come back. Wallis Day may have been a fan favourite, but when I saw her playing Ruby Rose's Kate Kane onscreen -- fairly or unfairly, she wasn't Ruby Rose's Kate Kane, she wasn't Wallis Day's Kate Kane. She was Ruby Rose's body double at best. It was the equivalent of body double Maria Stanton playing Wade in "Requiem"; it is an obvious mirage and utterly unconvincing.
Wallis Day auditioned to play Ryan Wilder. She was up for being the lead of BATWOMAN's second season and the writers could have brought her in as Kate Kane right away. They must have considered it. And it's clear to me why BATWOMAN's creators decided to bring in a new character instead and it's clear to me why they delayed having Day play Kate for as long as possible. They knew it wouldn't be the same.
I suspect that the situation with Bruce Wayne is that BATWOMAN's team can request clearance to use the character and their requests have been granted twice a season: once for CRISIS, once to use an imposter Bruce at the end of Season 1, once to wrap up the Hush arc and once for a dream sequence.
**
LEGENDS has been super-fun. SUPERMAN & LOIS is like a movie.