I'm a long player in Mortal Kombat games, since Mega Drive (MK2 and UMK3), and last in PS1 (MKT) and I noticed MKT was an awesome game that put's all first 3 MK games in one, with all bosses, characters, and stages, but I noticed some things were not in this game that should have been add, but the developers don't have time, or space in disk, or needed record some actors again doing moves, etc... But nowadays with the technology we have it should be more easy doing so.
Bug here are some things that I miss that this game should have:

1 - Johnny Cage (Ball breaker move from MK2)
2 - Kitana (Fan Swipe move from MK2)
3 - Scorpion (Scissors move from MK2)
4 - Shang Tsung (Human smoke morph - only possible in N64)
5 - Pit II fatality (from MK2)
6 - Khameleonm character (female ninja, Jade, Kitana Mileena - only in N64)
7 - Bosses fatalities (only in N64)
8 - MK1/MK2 characters running sprites
9 - Classic Sub-Zero fatality shouldn't been censored (MK1 fatality - spine rip)

I think this things should have been in this game because they all belong to games, and that was the game MKT should have been, the real trilogy... Nothing too much, only things that were in past games or another version of MKT like N64. What do you think the game misses?!? Take in consideration only MK1, MK2, MK3 and UMK3.
PS: For me (home player, not arcade one) Rayden will always be Rayden and not Raiden, the right name, but GOG rename it... Not the real version of MKT that was released in 1996...