I feel like if flash was removed then a lot of champion need some overhauls. Nothing major but I feel a lot of the gameplay revolves around that spell.
Well, yeah. I don't think anybody is talking about just yanking flash in the next patch. It's more of a post-season kind of project. Lots of stuff would probably change a little.
I think giving everybody free flash is a lot more likely than any of the other options, because it's the least disruptive choice. I don't think it leads to a 5-TP meta, like, if TP were that much better than every other option we'd already be in a 5-TP meta. Flash actually just is significantly better than every other summoner spell. That isn't true for any other summoner spell -- in general people have different priorities for the second slot, that's why you can tell what lane somebody's in by looking at their summoners. With a second free slot there would be actual variety rather than just whether top took TP or Ignite.
Riot has discussed it before, I recall reading, but clearly they didn't actually decide to do anything about it. So I wouldn't worry about it! But it is straightforwardly bad design to have a free slot that is actually mandatory for everybody except three champions. It makes the average player worse at both playing everybody AND playing the three exceptions.
tbh, i think it would drastically alter the jungle more than any other role. everyone has free flash and at least 2 lanes probably now have heal/barrier on top of that. who you gonna gank now?
Yeah, but you have ignite or ghost now, so your ganking is that much stronger. Junglers are, if anything, the most expanded as well, because they've never actually had any summoner choices before.