Revert Teemo's shrooms duration back to 10 minutes already.....
Teemo's mushrooms already suffered from nerfs the past seasons. Their duration was already reduced to 3 minutes on the twisted treeline, but that's okay since the map isn't even big, and the current map isn't as twisted as the old one to shroom a lot of paths. Then you nerfed the AP ratio from 80% down to 50% (P.S: it was 100% a long time ago #HALVED). And then you halve the duration on summoner's rift....... Really? It's a huge map, with a lot of paths/bushes to shroom, don't forget the objectives too! I'm okay with the arm time taking 1.5 seconds so that he doesn't throw them directly at his opponents, but 5 minutes? (T_T) sure the longer range and passive changes are nice but the longevity nerf is just rude.
Teemo can no longer accomplish his dream anymore 
http://orig07.deviantart.net/d58e/f/2015/083/9/b/teemo__field_of_dreams_by_robynlauart-d8mxvc2.png
EDIT: GG Teemo haters will just keep hating.