The most viable tactic in this season is snowballing
Thats sad 
EDIT1: Big amount of games i see people just pick the most snowbally champions , make pressure and win only because they snowballed their lanes vs champions who cant stand against them 1 v 1.... im talking about the whole team compositions, picking fiora yasuo caith, champions who are able to make extreme pressures from start... and do nothing but keeping high pressure till enemy team has only 1 tiny part of the map called base, and sad part about it that this can happen in 20 minutes, whioch in many cases doas(towers are weaker than ever, damages are higher than ever...tanks are out of any viability overal).. all of that wasnt posible few years ago , atleast not in such huge amount of games
Because of those elements which strongly encurage extreme snowballers game has become dull, boring, even predictable,and many other elements like good teamwork have simply just vanished from many matches...
well this is my oppionion , cant say that is perfect but i can say i am describing my recent experience....i myself even tryed to relly only on snowballing and i can tell, snowballing is the best way of handling enemy and even extreme early feeds in your team... and that is the sad part...there is a huge lack of diversity in this game
EDIT2: i dont know for the rest of you but in most of the games i only see 2 sides in of which 1 can snowball better...theres no interesting teamworks.... its mostly pure agression...i might be in delusion but it never look worse to me than it is now