There really isn’t much in MKT that wasn’t in UMK3 for the existing characters. Nightwolf’s tackle I think operates slightly differently, as I can get aaHPHP tackle, tackle, mid screen on many characters, but only Jax in UMK3. The Greatest Hits version has the same gravity as UMK3, but it’s still much faster. The added characters, like Noob Saibot, Rain, Baraka, MKII Kung Lao, are all extremely powerful, each with respective infinites/semi infinites, I would suggest pushing down much of the top and high tier from UMK3. To me, all this does is give more characters to compete with Kung Lao, Human Smoke, Kabal, etc, but make no mistake these characters are broken. The most broken thing about the game itself is the screen area vs character size, which throws some things off, but nothing to complain about.
MK3 Kung’s double teleport is nifty, and the fact that he can move with the spin is ridiculous. Scorpion’s forward teleport, imo, just makes him worth picking over Smoke at times because it does raise him many spots, however just as punishable. MK1 Raiden and MK1 Kano are very clunky, almost unusable characters, but MK1 Raiden does have that corner infinite. The Aggressor Meter should always be turned off. There’s no reason to use it. MKII damage also exists for some characters, which was a weird touch.
The bosses are an entirely different animal. They are all instabans as they are completely unplayable in any serious manner. Noob Saibot is obviously a ban, and Rain is a soft ban. MKII Jax is actually quite powerful, with his mix up air and ground Sonic Waves, and you can still use some of his MKII tactics. He’s definitely in the top 30%. Johnny Cage, nothing to write home about. Mid/Low tier at best. Red Moves, Double Missiles, Double Fireballs, air moves, Double Teleports, Double Dribble, Double Doogins, whatever the case may be, MKT is definitely a fun game, but if you want to play it seriously, fire it up on EPSXE and set it to 52.3 fps and it’ll feel more like UMK3 with added characters.