You don't see many Kabal players because there are other characters that can do what he does, only better.
I enjoy him a great deal and hope to see more representation as more tourneys take place.
His damage is okay for the most part. Until you land a Krushing Blow. Then you're gonna effin' hurt. He makes his launching Krushing Blows (there's four*!) count when he gets them.
I have barely touched Skarlet since picking him up. He has nothing stupid for people to complain about and is an honest character. He just destroys impatient people and/or those who don't know the MU.
I got my ass mauled by a Kabal one day and I remembered that when I decided I wanted to pick a second character. I'm really glad that I did. Hopefully more people will feel the same way and use him at tourneys. His db4 Brutality will slay the crowd if it's unlocked by default because it's funny af.
* - In case anyone is interested, his four launching Krushing Blows are d2 (universal), db4 on Kounter or Punish, bf1 Amp on Kounter or Punish, and b12d2 on Kounter or Punish.
He has a back throw Krushing Blow and f224 on Kounter or Punish.