There's some talks about it. It's evident (to Riot, or at least Guinsoo) that Flash is the source of a lot of problems including the super-passive laning phase.
What's stopping them is that they'll have to roll out a series of buffs and nerfs to people with built in flash, and people who needed flash to do anything.
What's stopping them is that they'll have to roll out a series of buffs and nerfs to people with built in flash, and people who needed flash to do anything.