That's what's going on again actually. There's more than 70 PLAYABLE characters, but not 70 actual show franchise characters. Like
Goku (Early) (Base)
Goku (Mid) (Base, Super Saiyan)
Goku (End) (Base, Super Saiyan, Super Saiyan 2, Super Saiyan 3, Vegito (Base, Super Saiyan)
Kid Gohan
Teen Gohan (Base, Super Saiyan, Super Saiyan 2)
Gohan (Base, Super Saiyan, Super Saiyan 2, Great Saiyaman)
Ultimate Gohan
Goten (Base, Super Saiyan, Gotenks (Base, Super Saiyan, Super Saiyan 3))
Piccolo
Vegeta (Scouter) (Base)
Vegeta (Base, Super Saiyan, Ascended Super Saiyan)
Vegeta (End) (Base, Super Saiyan, Super Saiyan 2, Vegito (Base, Super Saiyan)
Majin Vegeta
Krillin
Tien
Chiaotzu
Yamcha
Frieza (1st Form, 2nd Form, 3rd Form, Final Form, 100% Full Power,)
Cell (Imperfect, Semi-Perfect, Perfect, Super Perfect)
Trunks (Sword) (Base, Super Saiyan)
Trunks (Base, Super Saiyan, Ultra Super Saiyan)
Kid Trunks (Base, Super Saiyan, Gotenks (Base, Super Saiyan, Super Saiyan 3)
Android 16
Android 17
Android 18
Kid Buu
Super Buu (Base, Gotenks absorbed, Gohan absorbed)
Fat Buu
Raditz
Nappa
Captain Ginyu
Broly (Legendary Super Saiyan)
I can understand characters like original Trunks who has 2 different styles, sword and normal, but they other could have just had the transformation combined the way Freeza and Cell do. The Saiyan characters in the past games are always broken as [tornado fang]. At least combining the forms would limit them spamming attacks due to Ki usage just transforming.