I know this is another thread but I want to underline this. The BG3 engine is better set up to use 6 party members than is PoE RtwP engine.
I hoping they will change but my suspicion at this point is that the resistance to 6 party members is based in:
* 6 exposes the weaknesses of the party control system * 6 makes it clear that there are far few companions than BG2 had
Otherwise, I can't see a decent argument for 4 other than a desire to maintain the status quo.
Swen already answered the question related to 6-men party (I think one or two months before EA release?) it was one of the interviews with Dropped Frames I do not exactly remember the answer but it was about the design and how they can handle a 4-men party better than 6(I think) I am sure you can find it on the youtube
