Remember Team-Fighting?
I know a lot of people disagree with me, but I personally found tank meta (aka cinderhulk meta) to be really fun. Why? Because there were epic team fights lasting up to 20 seconds and games went past 30 min. Now, whichever team gets a lead runs away with the game and there isn't any real team fighting.
Even last year there were some games with team fights in them. This season, if you're behind, you can get a 5 man Kennen ult and still lose the fight 5-0, or if you're ahead, people die so fast you lucky to catch 3 in a Kennen ult before your team destroys them.
This meta is not as fun as previous seasons because team fights no longer exist.