I liked Vesper's breakdown of it alot Ari's had some good points as well. I'm basically a MK only player and have been here since 92.
I like the slow pace of MK11, the focus on footsies and neutral, there are 50/50s but it's been toned down dramatically compared to MKX by making them unsafe or for the most part reactible if you are looking for it. Vortex doesn't play as big of a roll as it did in X and there are counters for literally everything so it is a more fair game design.
What I don't personally like is the very basic feel of Characters and how they are lacking and limited in many ways compared to MKX. It doesn't feel like there is much tech and many characters feel bare or like they are missing something some even Braindead. Erron does have some difficult dial combos but other than that it's very basic once you get the rhythm of the character down and muscle memory.
Combos are way shorter and very limited and I personally don't like that change, I'd be fine with somewhere between MK11 and MKX comboability and damage can be scaled however they please.
I just don't want to get board with characters yet and feel many need more depth but I do enjoy playing with Erron, Kotal despite his problems and Sub Zero (but I feel he is a one trick pony, do the mix) Liu Kang is the same but F43 mix.
I don't know if adding Custom variations will change depth of characters but I'd like it and I feel a few more moves could launch maybe adding depth in that area instead of having cancels like X.
I really hope many characters get much needed adjustments. I'd rather sooner than later so I can use my Kotal in tournaments. Some characters where poorly designed Move/frame wise like: Kotal, Lao, Frost, Shao, Kano, D'Vorah and a few others. Jade is a good keepout character but I feel she could have better combos for once and something to add depth, same with Sub Zero (his comboability needs to be better or give him cancels) some Characters may lose safe mix and I'm fine with that just give them depth. Compensate the characters you Nerf please.