Problems with the current meta
I for one main 
so u might see why my thoughts are this way but with the current tank meta leaves for these games that last 40 or so minutes at a time and it lets everyone get full build. this part i dont mind but the part that bugs me is that unless u have alot of tanks with cc on ur team then u are gonna lose immediately late game and even sometimes early game. But when it gets to these late games and lets say for example ur team is far superior in skill and u have been winning every lane and u pushed them to there inhib turrets on all lanes all it takes to win is one more team fight. But then one of ur team mates gets caught out (which it happens to be best of us) suddenly they have the advantage and are able to get baron and before u can regroup and try and 5v5 they push 2 towers mid and take an inhib and also dive and kill one or two people now u still cant fight because of pure number advantage and then they push to win. this has been about 70% of my games and it annoys me because its not even who is better anymore its who ever makes the first mistake late game.
main, and don't take me for granted, but I've noticed this as well when a team has more tanks they are more likely to win if the gamew has dragged out for more than 40 minutes. I can't use any of my recent games because my teams have had less or the same number of tanks except for the last, but nunu built ap rather than tank so it was 2 for 2. But when you see more tanks you know you have to worry about the enemy teams tanks more than their carries. Essentially the tanks become the carries hhaving higher kda ratios than the actually damage dealing carries in some cases. personally I don't mind having longer more exciting games that actually make you focus on how you engage and are nearly entirely teamfight base (I don't like that its been solely based on teamfights to obtain victories...im a split pusher) but the game is advancing and idk with the latest patch we may see more diversity in team strategies and youll maybe see a full squishy team whipe out a team with 3 tanks and 2 hyper carries.