I don't care what kind of challenges you wanna overcome as developers with party of 4 or what kind of challenges you wanna put before players with party of 4. It doesn't change the fact that party of 4 is too small for an immersive DnD game.
It takes away a lot party setup possibilites and I fed up with going back to the camp leave some one and take Astarion whenever I need perception and sleight of hands rolls.
Dnd is based around parties of 4 players. You can have more (or less) but generally need to adjust things like monster stats or situations to make challenges winable in those cases.
