My biggest problem with the offsprings is their designs, no unique clothes/details/powers whatsoever, just 3 random dudes who's only hope is their parents fame.
Just compare them to the rest of the roster:
Scorpion/Sub-Zero - two ninjas, MK icons, 1 with the spear, 1 with freezing powers
Reptile - reptilian creature who can turn invisible and spit acid
Ermac - telekinetic levitating mummy
kitana - female ninja who use fans as her weapons
Kung Lao - chinese cowboy who use his hat as buzsaw and this classic bad guy from Bond movies
Raiden - the guy who shoot electricity and lighting bolts and wear a chinese hat
Kotal Kahn - alien aztec
Dvorah - insect controlling creature
Mileena - female ninja who have huge teeth and eat her victims
Kano - criminal element with terminator like eye and impllant instead of his heart
Ferra/Torr - small dude riding and controlling the big one
Goro - 4 armed gorilla like dude
What new or unique these offsprings can offer? Jaqui Jax have Sektor's flamethrower or Jax's "rockets" - already done in MK, no standout design details. Kung Jin - Nightwolf already used a bow, no standout design details again, Takeda - take a spin on MKA Jarek's moveset probably, no standout design details, these 3 looks like they were done in your standard character creator when you start any RPG game - race human, male, face 5, skin color 2, armor 3 color grey, primary weapon - standart bow.