I get why his ki wave and specials changes in each form, but I don't think his KI Blasts should change too since they always remained yellow in the game

I don't know, I've never played that game. The colors were chosen by Fredmui, who apparently knows Xenoverse well, since he’s the one who drew Future Warrior.

I played the games too. The KI waves differ depending on the moveset we have. But the blasts never change

yeah but ki blasts and waves and auras are all the same colour by default in this game arent they? At least that's a pattern across 90% of the roster, like every character with a white/pale blue aura that also has white blasts despite that being a colour damn near nobody in the show actually has lol. It's already rare to have a character have their Ki and aura be different colours, but to also specify the difference between Ki Waves and basic Ki Blasts? And for Ace of all characters 😭 meanwhile Saiyan Saga Vegeta has purple blasts, waves and aura in the game, but in the show he has an indigo blue aura, purple Galick Gun and yellow or indigo blasts, depending on the episode

Es una referencia al ataque de Cell llamado Perfect Shot.
Igualmente tienen un punto con lo que dicen, las bolas de Ki comunes en Xenoverse 1 son siempre amarillas, yo quise irme por un lado más divertido y varíe esos colores en referencia a otras habilidades.
Si enserio genera confusión y les parece mejor cambiar todas las bolas de Ki a amarillo, tampoco me parecería mal.

Go for yellow, then 🤷