I actually made a list earlier of all the things that MK11 should improve on from MKX..Its a long read.
1. Customizable Costumes - Similar to the newer Tekken games or maybe MKA. There should be a way to customize different parts of your characters. The "unlocking preset costumes" is getting old. Some people like classic, sorry, KLASSIC Reptile but some people like new, so maybe if there were a way to COMBINE different features (Reptilian Head with ninja outfit). It should be in.
2. More Stages - Let's face it, the environment and setting are what makes Mortal Kombat so great! We all remember The Pit, Dead Pool, Shang Tsungs Palace and all the amazing tunes that go with it. I loved the stages in MKX, however, 13 is an unforgivably low amount. Same as the laziness in the story mode like in Kotal's chapter where one minute they start off fighting on a road...next second they're in Outworld MarketPlace..WHAT? There's so much you can do with Mortal Kombat its insane. Also, I love metal music as much as the next guy, but I don't like how forced it felt in some stages just because its the "modern" thing to do.
3. More mini-modes like in Deception that add onto replay value, making the player want to PLAY MORE! MK11 will likely be released around 2019, gamers want more than just simple one on one fighting. Chess Kombat, Puzzle Kombat, and even Motor Kombat added on to the good memories I had with some of the older games.
4. Better Netcode - The Netcode sucks in MKX. 'Says I have good connection, yet I can barely pull off a combo the input delay is so bad. Really hurt MKX for me.
5. Extra Content - The Kontent in MKX within the krypt is a bit disappointing. A ton of it is just Brutalities, those "cutie Icons", etc. It was fun seeing the random crap come out of MKDA, like those silly blooper videos, crazy promo renders and all those unreleased demos. In MK11, they should make the player feel rewarded, include some demos of arcade titles or something, I don't care if it means getting rid of the "point-and-click" aesthetic, cause players aren't there to say "Ooh pretty Bump maps!", no we're there to unlock things.
6. Micro-transactional stuff - Having players pay over $120 to unlock the whole is asinine. Pack all the content within the title, because no one likes this Micro-Transactional crap. That "Blue Steel Sub-Zero" is a blue skin of that "Gold Scorpion", which might I say looks terrible, and they expect us to pay 2 dollars for them separate?! ...Shame. I remember seeing the behind the scenes video for how it was made and thought "umm, yeah, I know your having fun and feel inspired...but your designs look crappy, and I truly don't know what NRS saw in your project".
7. New Engine - Get a new engine. Its been the same since MKvsDC (which I just got recently, whole lot of fun to play). It definitely has worked, but c'mon we got to move on!
8. Tag-Team - Bring back 2 on 2, maybe even 3 on 3 (from MKT). Whole ton of fun to play
9. Improve Story Mode - Remember the Challenge Tower from MK9? Remember all the different little Scenarios the game threw at us? Why didn't they implement that in the story? Also! Don't make a crap character like Cassie the protagonist ever again. Reptile as the Hero would make more sense....
10. I know I'm the only one to think this, but...I kind of want Mortal Kombat to go back to 3D, not going to explain why, it could be because I grew playing between MKT and MK4, but personally I'm just tired of 2D. Its been done so many times in recent fighters.
Rant over.