I can't speak for everyone, but i really wouldn't have given two shits if they had BotW's waifu Zelda fighting with powers she didn't have in that game. Hopefully, they'll at least have some other games' Zeldas as alternate costumes or something, cuz i'm really not a fan of that aLBW design. It was fine in it's own game, but it just feels off-putting and out of place here.
I agree that they shouldn't have used ALBW Zelda, but only because she's shit compared to Waifu Zelda... just so long as you understand that Waifu Zelda is Twilight Princess Zelda and not the U-Wot-M8 thicc-ass do-nothing-but-cry Zelda from Breath of the Wild.
The only reason it seems out of place is because you're used to all the Zelda characters in Smash having consistent designs from a single game. But if you look at the roster, they're not sticking to ANYTHING:
Link: Barf on the Wang
Zelda: A Link Between Worlds
Ganon: Ocarina of Time
Sheik: Twilight Princess (unused concept art)
Toon Link: Wind Waker
Young Link: Ocarina of Time (the only game he's been in)
Maybe you feel it off because "at least Link and Zelda should be consistent," but they would look more consistent if only they kept Zelda as the elegant TP design and not this pedophile bullshit. Then again, with the exception of Skyward Sword, they aren't romantic with one another, but yeah.
Either way, I'll take any Zelda over BotW shit.