MKX brought:
+ The adorable duo of Ferra & Torr; whom are still slept on because of their niche nature.
+ My one true main: Jason Voorhees.
+ My alt-since-forever from MK9: Cyber Sub-Zero, complete with a gimmicks-incarnate gameplan just like in MK9 + Noob Saibot's low damage.
+ Extraordinary sound design. Close your eyes and listen to the various in-game sounds with headphones.
+ Fantastic character designs.
+ Variations!
+ Brutalities.
+ Smooth-looking animations and combos.
+ The return of the run mechanic, (thanks to the silly-looking dash-blocking from MK9.)
+ Blockable interactables!
+ The destruction of WBIE's reputation on the PC platform (alongside Arkham Knight.)
+ The realization that guests are here to stay. (NRS, please add Terminator in MK11, and Neo in Injustice 2.)
+ WAIT, FOUR GUEST CHARACTERS?!
+ Earthrealm Teen Titans, Go!
+ After MK9's sexual appeal (the women's outfits and shapes, the 'roided out males,) we have reasonable outfits all around, body shapes and roid rage in males. (Erron Black's alt, tho.)
+ Character introduction dialogue.
+ Features the first female protagonist
+ Includes the (technically) first African-American female. (Now let's hope the concept art is indicative of character development in MK11.)
+ Sonya's character development has reached its peak.
+ Kotal Kahn and his crew are all awesome.
+ Shinnok was like a clown in MK4, now a respectable troll in MKX. #D4xxSparks
+ + Not in Story Mode, though. #GotCAGED
+ Please just rework Kenshi as a non-zoner in MK11.
+ + Balanced variation (a.k.a. Normalized variation)-related issues aside, he's aesthetically awesome.
+ Poor SaltShaker's torment. Paulo, plz.
+ More Sub-Zero issues and more Scorpion costumes.
+ Tremor's redemption from MK: Special Forces.
+ Triborg.
+ Return of hitbox inconsistencies between costumes. They're hilarious.
+ Reptile can speak again.
+ #Punchwalk
+ + Punchwalk on block~EX Punchwalk on block~EX Punchwalk on block~EX Punchwalk. The ride never ends!
+ A bunch of other things, like Kung Lao's Quarrels!
I'm not as into MKX like I was with MK9, but I still had/have a good time. I play these things for fun. There is no point to playing video games if you're not having fun. MK supplies it plentifully for me!