Mobility Creep, STOP!

It's ruining the game to me, half of the champions are unplayable because every game you run up against champions like

Who get all of this on demand, almost instant, free targeted (more or less), mobility which completely screw you if you play any champion that lacks equal or more. Mobility is the answer to just about everything else in the game. Getting ganked - mobility, chasing - mobility, dodging skill shots - mobility.

I know this was addressed recently in the Q&A with statikk, but it isn't even just a matter of the immobile mid-lane mages. It's any champion that doesn't have copious amounts of uninterrupt-able mobility. As statikk said, they didn't value mobility enough when designing champion's kits. So why is it that when reworking champions like nid, they arguably gave her more! Lucian also got massively more after the changes even though his range was hit, the amount it was increased was not justified.