Singed. What really needs to be done.
I want to start by saying that Singed is my favorite champion in this game. I identify with him on some weird level that I cannot really explain. He just fits for me. I love the upcoming update that you are giving him and I think that the fling adhesive tandem is going to be a fun game play element to have when I get the rare opportunity to play him.

Singed main issue in my mind is that he has no gap closer. My solution to this is to add one to his fling, but only when he is in ult. This change would keep singed relatively the same, but add even more emphasis on properly using his ult and then actually being able to get into the back line before they run miles away. I'm not talking anything huge, but more the distance of Garen's ult. Singed simply dashed forward and flips the person slightly further back than normal.
I think that this in addition to his current kit and the new mechanic on Mega Adhesive (which should also just be a changed ability on Ult IMO) would make Singed viable in a lot of match ups top lane that he isn't viable in now.
What do you guys think?