Blue
Ravenous Bugblatter Beast of Traal
I think that would undermine the idea of the Champion/Brute as "the simple one".Would rather see it as additional Champion options (like SCAG added Totem Barb options).
I think one choice every 3-5 levels is not overwhelming. Where I play, that's about one choice every six months to a year.
I have faith.
The Brute is what "fixing the Champion" looks like. Why use the same name and thereby implicitly invalidate what's printed in the PHB?
That's a valid way to look at it. My personal preference is the opposite - I've seen too many editions of D&D with option paralysis with too many choices that I'd rather keep it streamlined. For me, every design addition needs to be prefaced with "does this bring enough to the table to offset the complexity it's adding".
But, as I said, your way is valid. Keeps the existing characters happy, and gives the choice to the new folks. I can hear someone echoing back my earlier comment: "Have faith". And with that I accept it.