I've offered my take in various other threads, and the only real significant feedback I have is to drop the '3' in the title. Certainly call it Baldur's Gate: Something to keep that desired awareness of mind in the consumer base at large, but it avoids (mostly) the feedback critical of calling it '3'
That might have been a good move beforehand. But now they already have a logo plus title and showed it in trailer and everything. Chickening out now would only embolden the opposition it has a similar effect to negotiating with terrorists. Plus its probably even called that in contracts with WOTC etc.
If they deliver a good product and maybe do some minor changes that show good will and they care its fine without compromising on their original intent. No need to redo the whole game nor could it be done at this point. Just hold fast and the drama will pass.
I don't think there would be any negative consequence to changing the name of the game. Nobody cares for it to be called BG3 - not the DOS fans, and not the fans of Baldur's Gate. All that titling has done is make fans of Baldur's Gate angry. The DOS fans couldn't care less what it's called. So, they should change it.
And your relating to terrorists the people rightfully upset about Larian's false marketing and cash-grab move calling their D&D game "BG3" is deplorable. It also is astonishingly oblivious in that it misses the point that if the name was changed there'd be nothing to embolden Baldur's Gate fans concerning, since they could no longer criticize Larian's D&D DOS formula game for not being like the original PC series Baldur's Gate. I don't know how your logic works, but if the name is changed then the critics of Larian's game being falsely named and disrespectfully co-opting the Baldur's Gate series won't have anything to criticize anymore.
