I've been playing tabletop for many years, and I believe that the more people at the table, the more fun the game will be.
As someone who regularly partake in 6+ players tabletop sessions, it isn't the case. Parties that large remove personal initiative in favor of the group, and it adds tons of dead air as soon as an action that is involving only part of the group is happening. I am pretty sure this is why BG3 has a party of 4, for a seamless and enjoyable multiplayer experience (and no, 4+2 companions ain't it).
Yes, exactly. Great for MP; utterly crappy for SP. Larian should just admit the truth that BG3 has been made for MP and is not recommended for SP.