I'll be totally honest here, I dropped him shortly after release because I was just so frustrated that NRS didn't completely redesign his move-set between INJ1 and INJ2. Thus, I'm definitely not a a great person to ask.
However, I do still mess around with him, and if pressed, the one thing I would point out is that I feel as if he was designed with the idea that Gunshot would be his dominant mid/long-range tool. Unfortunately, because of characteristics like insane mobility and fast advancing mids that low profile like a mother fucker, much of the cast can deal with Gunshot much better than they should be able to. I'm honestly not sure what to do about this.
Again, I would have really liked to see NRS revamp his entire move-set during development.
Edit: And, his trait is still total ASS. I'm not sure why NRS can't just give him a broken trait like half of the fucking cast. Like, his trait in INJ1 was arguably the worst in the game (along with maybe Cyborg's?). Amazingly, it's possible that his trait is ALSO the worst in INJ2. Why can't they just give him average mobility and then give him a different trait? I just don't agree with the character design.