They DID do that with Sion though, about 8 months back. They asked people, what do you hate about Sion, what do you like, what do you think we should do. General consensus was that with old Sion we hated the fact that regardless of what you build you have 2 useless spells. W and health stack were our favourite aspects of sion, and that his stun was the thing we liked the least (We also hated his mana costs).
We agreed that while we might miss AP Sion, he wouldn't be missed that much for a more useful version of him, some of us also thought that AP Sion shouldnt exist, because undead unkillable warrior shouldnt be mage. We agreed though however that Sion shouldn't particularly have sticking power, i.e. Sion should be a juggernaut slowly coming to you so you have that 'oh god its Sion RUN!' thing going on,
There were also actually questions based on lore as well. That's where the writers got the idea that he had to have accomplished something significant to be revived or else it wouldnt make sense that Noxus doesn't just have an undead army (guess they went with killed Demacia's king, and we'd revive more but this one kills our Noxians as well).
You're right though, as of recent, I don't see many Reds asking questions, (atm most red posts i see are from KateyKhaos but while im not 100% sure what she does im quite certain its not champ reworks) I'm hoping the rework team is slowing down so that some idea of what/how Season 5 is gonna be before they start working on changing kits again and that is why we aren't hearing much, because there isn't much going on on that front, even so, It'd be nice if they told us that so we wouldn't worry before they do something crazy like turn quinn into a mage or something behind our backs.
A lot of it probably has to do with the new direction they have for LoL. For supports at least, most of the discussions for change are overwhelmingly negative, for good reason mind you, but that doesn't help Riot as you can probably imagine when they're so hell-bent on changing certain champs. I hate to keep using this example, but Sona is the best example I can give atm. Nothing about that rework was handled well. Large threads with hundreds to thousands of viewers are a dime-a-dozen on the subject. Riot did not handle communication very well. They were shot down at every turn with some occasional blessings here and there if X issue was resolved to compensate. Even after the rework, after Rioters put themselves out there and challenged us to say it still sucked after using it for month, guess what happened, two huge threads popped up saying it still sucked.
The Soraka rework seems fine from my point-of-view (I don't use her so my opinion doesn't mean much honestly,) but based on random comments I see here and there, they got negative feedback from that too. They're probably gun shy. Every time they post, people see a chance to ask/attack them "WTF are doing to (insert X here)!?"
: hi