What I think the true issues are with Sliders is this: It never had enough traction when it WAS on TV to ever get a second thought as a reboot. We have to remember some key things about Sliders:
1. We fought tooth and nail to get season two made. If it wasn't for the email campaign that crashed FOX's servers, Sliders would've joined VR-5 for good.
2. Sliders still was on the bubble for a pickup on season three. That was never guaranteed.
3. Sliders was never a ratings hit to justify much attention. Hence why episodes were out of order for every FOX season and how much the network meddled in it. If Sliders was a hit out of the park, they'd be hands-off and let production handle itself like with X-Files.
4. Scifi made some good strides to get the show back on track but they too never gave the show enough budget or direction to take it to the next level.
Sliders was always the "little show that could" and I still am amazed that we got five seasons. We had to fight for every single one of them. If you look to a much more popular show like Quantum Leap, that STILL has no chance of coming back and that was way more popular than Sliders, IMO.
I want a reboot / reimagining more than anyone and the fact that Jerry is on board is a HUGE plus. However, it's a property that is a bit tarnished due to how it was handled and no major powerhouse to champion it.
At the end of the day, without someone who holds actual power either at NBC Universal open to the idea of bringing it back, Sliders has no chance. This makes me wonder if the efforts to do something need to be more focused on the business side such as trying to bring it to the attention of Netflix's brass or working to contact Universal and getting their attention. Once someone's eyes are on it, THEN we pounce with a Kickstarter / Jerry / petition / mass movement.