I liked Amanda, but I think I'd prefer a new protagonist.
As great as her voice acting was, the entire story wasn't very good. I liked Amanda well enough, but as long as the new protagonist is well voice acted we wouldn't be missing out on much.
Amanda being Ripley's daughter didn't really add much except weird timeline shenanigans. The idea had potential but it'd change very little if Amanda was just some random.
We already know how her story ends, and it's not hard to figure out how Amanda survived.
Amanda served her purpose well, but it'd be a lot more interesting with someone new. Amanda's story and character wasn't interesting enough to need more.
I definitely wouldn't be upset if it's her again, but I think there's more value in a new character.