I don't like the lack of solid universal anti air options, the game is a bit of a jump fest at times and I'm not just talking about online. It's not like I want a full combo every time someone jumps, but if I'm waiting for it a d2 should work 100% of the time.
I don't like how burning meter on a wakeup doesn't guarentee that you wakeup, I feel like if I'm burning meter to get off the ground and I've made the right read I should be awarded, at least in high risk situations. I do like that no one gets off the ground for free.
The abundance of launching 50/50s and +frame block pressure in a game with few defensive options rubs me the wrong way as well.
In summary I feel like defensive players have been shafted. I think the game is fun but in it's current state it is the weakest of the 3 competitive NRS games. Thankfully NRS have proved they can turn a game around, at this point in Injustice the game had similar problems and was just a complete mess until some very big changes were made in the last patch. MKX is nowhere near as bad as Injustice was 3 months into it's life, a few big changes could make it the best game yet.