Tahm Kench: Eliminating fun since 2015
How it feels to play against Tahm Kench:
Want to poke him down? E passive says no.
Ok then so can we just engage on him? E active doubling his effective HP says no.
Well how about we just kill the ADC then? W active says no.
What if we get Vi to ult them in a gank instead? 10 second W active cooldown still says no.
We need to run away? We need to catch up? Q & W say no.
Fine then, we'll just stay in lane...? Great long-range damage as a TANK says no.
Then let's tank up and counter him that way? 32% max HP damage on W says no.
Then shall we split push? R active says no.
Then I guess we'll just farm 15 minutes until something interesting finally happens...? I have an aggro-swapping movespeed-buffing tower-diving ability for that... and it's on a 10 second cooldown 
Regardless of his balance state, this is not a fun champion to play against. No champion should be able to DO everything and STOP everything all in one kit. Strength is not an issue here - being able to do everything that 5 other champions combined couldn't do in one kit is. A Riot member even posted this quote:
"It's great, I don't even have to pay attention now as an ADC, he'll just carry me safely back to tower in his belly if I'm about to die." (Link: http://boards.na.leagueoflegends.com/en/c/gameplay-balance/gaPOFELF-tahm-is-fun-as-shit?comment=001d)
Does this sound fun to play against to you?