Starting to see more now what you meant about how crazy it can be at times having to remember all these combos. Just realized I had forgotten the main ones with Predator when I started using him again earlier, so had to go as far back as page 50 of this thread to relearn some of the ones like what you had listed (namely ones for warrior variation), but still remembered the combos for all my other pre-KP2 characters/variations, oddly enough.
Got the 100 win card backgrounds for Bo Rai Cho and Alien (Bo's is just him doing his fart special in the destroyed city stage), and 50+ wins for each of the four Triborg variations. Will prolly get the 100 win ones with each next time I'm on the game for awhile.
The Cyrax net combos are decent and surprisingly simpler than I thought. That Alien acidic corner combo is pretty good too. Starting to get a better idea of when to use acid on the ground even when not doing corner stuff (same with Bo's ground fire in dragon breath I suppose), and Smoke's smoke cloud combos are awesome anywhere you do 'em. Like with previous games though, I still like using Sektor a little more than Cyrax. He's got some good setups you can do with the teleport uppercut and homing missiles. I wish Cyber Subby had the icy counter like in MK9, but the damage buffs it can get from the drone summons makes up for it I suppose.
Pity about the Tremor nerfing, but I guess it was to be expected. As for my KP2 list, I guess it'd be basically the same as yours, but for overall list out of the DLC's, it'd be
Triborg
Alien
Bo Rai Cho
Predator
Tremor
Jason
Tanya
Leatherface
... Or something. Could always change in the future though.