15 min ff is anti-fun IMO
From both sides of the 15 minute surrender I can say that its terrible for this game. If I come out on top of my lane opponent I want the chance to show off my power a little before the game is over. If I am losing my lane I want to try and comeback from laning phase.
Nowadays if one team has an extra tower on another surrender votes start popping up. 20 minute surrenders were fine these 15 minute ones are making the game seem boring. It's like you are eating a delicious slice of pie but after you take one bite the pie is snatched away from you.
Quitter culture used to be frowned upon, now if you don't wanna quit your seen as the bad guy. I just wanna enjoy what I worked for in lane ( a lead) or cross my fingers for the comeback teamfight. I guess that era of league is over.