You cannot change anything now. The games coming out in early access this year. No amount of complaining will make them change the name.
note, it was WOTC who specificalyl asked them to do Baldurs Gate 3. They didnt ask em to make Waterdeep: the game, they asked them to do Baldurs Gate 3.
On the "pay respects to us" Which implies that "You" are a Homogenous group. A lot of you people like to act as if there is a Homogenous group of "Baldurs Gate fans", while you can bareley agree on anything. Half of you thinks it shouldnt be 5e but 2e instead, a quarter somehow thinks baldurs gate was 3.5, and another thinks 5e is hunky dory but should be RTWP. Then theres a large part thats fine with TB even if they are hardcore fans (which get excluded from the conversaiton real fast)
A lot of you go on about Baldurs Gate specifically beeing about the Bhaalspawn, while others argue that picking up an old plot would do a diservice to it. tons of people say illithids have nothing to do with Baldurs Gate, then some people remember that oh yeah there was this thing with the Illithids in baldurs gate 2.
As Sven said, you cannot placate everyone. There is no homogenous block of "baldurs gate fans" versus the evil divinity fans. the only thing you are actually united in is your dislike of this game. And that dislike mostly comes from the fact that nothing could ever live up to your expectations.
Actually, the game is in pre-alpha and supposed to come INTO Early access this year.