After having a salt overflow I decided to go on a bit of a hiatus from the game to collect my thoughts, I haven't had a normal match since August of this year and now I want to come back.
Anything would be greatly appreciated.
Nothing super much has changed since then, as balance patches were small due to Worlds prep. Xin and Azir got some minor updates, Eve got her VGU, Ardent got heavily nerfed (mostly in newest patch), AP Galio is broken right now (ban him)...err, Ornn may not have been out yet, but he's pretty ok. Not too popular, but he's strong when you know how to handle him.
I think those are the big things. I'd read up on at least the newest patch notes, to get a more in depth look at the newest game state
Though it's rather difficult to describe all the changes, you could go into practice tool and look over things, it helps catch people up without having to go into an actual game.
Dominate the jungle.
Mid lane is more or less utility.
Top lane is dominated by 
or champs that are extremely tanky, unkillable, and can waveclear, and TP bot with tons of CC.
Dominate the ADC roster.
with 
Dominate the whole map with their ADC.
Just got buffed this patch and is broken, and a permaban
ADC builds 
and support builds 
. and support runs 
, and adc runs 
, if one side is doing this and not the other, the side with this strat is more than likely going to crush.
still one shots squishies when you're ahead.
And thats about all you need to know
EDIT: also 
are the 3 core items on any crit adc
The game is shittier, get away while you still have a soul
