I’m torn on how much we should customise companions when we’re not playing them as origin characters. It certainly does me no harm if the option is there and I don’t use it, but think I prefer to have the challenge of making them work as presented. I do agree that some of their starting stats and cantrips now aren’t ideal and want these to be changed, but hope Larian will do this and not use the fact that I can change them in the full game (if I can) as an excuse to leave them as they are now by default.
Of course, if I do end up replaying the full game as much as I think I might, I may well come to appreciate more flexibility, though I’m hoping that if companions are fundamentally well designed at whatever level we encounter them at, then we’ll have the opportunity to use multiclassing to add variety in subsequent playthroughs.
They also need to let us make our own companions, maybe recruitable from a mercenary guild or something.
Yes, whether or not I’d use custom party members will depend on what companions we get in the full game, but this would be a good option to have to be able to try out different class combos in single player than we could otherwise achieve, or if the pre-built companions come to grief, leave us or don’t suit for other reasons. There are various ways that Larian could put some story wrapping around this option and I hope they’ll come up with something fun!