User blog comment:Lykrast/A suggestion about Flash/@comment-7487223-20130709031619/@comment-7487223-20130709131551

Also the summoner spell CDs add more complexity to the game. If I'm Xin Zhao and go bot lane to blow two flashes, I'd be very happy because this alleviates pressure on my botlane. And if they overextend and I gank again, that's at least one guaranteed kill.

And Yordle stompers would be a terrible idea. Imagine an Udyr with Flash and Ghost...

in the end, it would just make the boots more OP and in need of balance.