PLEASE PLEASE PLEASE bring back custom item sets for the new client.
-Warning: all caps ahead-
THERE IS ABSOLUTELY ZERO REASON TO TAKE THIS AWAY FROM THE PEOPLE THAT USE IT EVEN IF ONLY A MINORITY USED IT.
People that use item sets use it because the "recommended items" page is BS and bad, not even worth it as a cookie cutter build for some champs. Not only that, but people that use item sets use it because different situations call for different builds or items. One game you are building thornmail+frozen heart because the enemy team is full AD, the next you are building visage and veil because the enemy team is full AP. I don't want to have to constantly search for my items when I could just use a custom item set. There is also zero benefit from you taking it out and zero negatives from leaving it in. So please just bring it back.
For some people, like me, item sets were as important as runes and masteries. They honestly were.