Revising what I said earlier about pulling back the release date: BG3 is releasing close to Starfield, and Starfield is BY FAR the heaviest hitter in the RPG space in Q3. Q2 has some hitters. Releasing after Starfield is a mistake. I would move to a mid-August release absolutely if looking for a media-monopolized debut for RPGs. Releasing at the same time as a "major" game from a "major" studio in the same genre is a huge mistake. Give BG3 an extra week or two of legs please.
BG3 has had two and a half years worth of legs over Starfield. Anyone who hasn't already bought BG3 at this point is either waiting for reviews or sales, more likely the latter rather than the former.
Moving full launch to mid-August won't move the needle at all anyway, it'd have to be late July/early August for it to matter.
I doubt they move it up. I think the only scenario that makes sense is they move it back to a 'holiday' release in November or very early December. But even doing that I am sure it would just run into other big releases as well around that time of year.