Raging fanboys as you call them (us) wouldn't rage if it was not BG"3".
But the only thing you're going to answer is "D&D rules + Forgotten Realms" again... While we explains why it is not a "3" according to us.
Hypothetically, if you had received the game of your dreams, but the title was something other than BG3 (e.g. Baldur's Gate: Return to Faerun), would you be just as upset?