Champs that have a single binary form of movement are a-okay but a champ with 2 - 24.5 dashes it's starting to get alittle overboard. like a summoner that stops all dashes or mobility for 2-3 seconds.
Yara02 votesMore things like 
w would be nice.
TheFlyingBaluga1 votesI think that translates into a stun or silence (ex. Garen i my fav to counter that)
ApexInTheCircle1 votesI think that translates into a stun or silence (ex. Garen i my fav to counter that)
In terms of kiting and trying to catch a target that is able to control the flow of combat via their mobility.
Crispy0Snake1 votesI think that translates into a stun or silence (ex. Garen i my fav to counter that)
Not exactly, the type of cc would be "Grounded" and is a cool feature of Cassiopeia's Miasma and Singed's Mega Adhesive, see more here http://leagueoflegends.wikia.com/wiki/Ground#Ground
But yeah outside those two champions there is no other way to get that form of cc.
Rexxiee1 votesMobile champ most of the times are already paying power of their kit for the mobility.
So no, we do not need anything anti mobility.