I can agree with that, though for that very reason I'd say Freeza's 2nd and 3rd forms were bigger wastes of potential as they could've been far more interesting than Pure Boo. Beyond the power creep, I wouldn't have minded Freeza having so many forms if they at least warranted him not using his true form immediately (especially when him stating it was too much to control was a lie, at least for up to 70%). For example, you could have 2nd form being a bulky tank that sacrifices some speed for far more power like a better Grade 3 and have 3rd form being a weaker speedster similar to Dyspo. Pure Boo's potential as a character was pretty limited from the start without rewriting everything from Fat Boo's split, so his existence didn't really seem like that much of a waste after Evil Boo simplified what potential complexities Boo could've had as a character.