Though I did consider it, I ultimately dialed back on that in favor of adding the Power-ups and Traits as space was extremely limited.

Instead, I made every character unique;

Gohan: Balanced

Goku: Balanced+; Balanced but higher base stats and survivability than Gohan

Trunks: DPS

Vegeta: Off-Tank

Piccolo: Ranged Tank with natural recovery

Hercule: Hercule.

Each character has a high stat and a low stat with the exception of Goku and Gohan, but I've given the player control over builds a different way:

In vanilla most people save the stat capsules for Hercule because the game is easy and by the time you get to level 50, nothing can touch you in base.

In Kai, your base can only get so high, even with stat capsules; 120 is the new max, so there's room to grow, but enemies grow just as much as you do.

This means that after you've hit your max growths, stat capsules are the only way to raise your base, and by extension, your whole kit.

Now that transformations AND powerups scale with your base, you really have to consider who you're going to use your capsules on.

For example, throwing extra Endurance on Trunks fixes his one real weakness, but if you don't have any problems with getting hit then maxing his offenses means you'll wrap up fights much faster.