I hated DOS2 system with kicking parts of the party. If this is going to happen in BG3 again then chances are actually that I will create my own party as soon as possible and drop all origin characters.
Now, there is one idea I heard and actually it would save this from being a disaster for me the way DOS2 party system was - Origin characters are just that, but the real companions come in act 2. So basically you can keep your chosen 3 origin compainions if you want, but they are actually really just alternative background stories for the player. The real companions for BG3 are just NPCs that you will encounter later on and build a party and switch them out in camp the same way you did with origin characters in act 1.
Realistically this sounds like a lot of work that might be wasted for Larian so I don't expect it happen.
I have yet to finish the act 1, but I'm going to be honest - act 1 was not enough to make me care about any of them enough to chose any of them to follow me. If they are the party for the full game than I will give them more time to convince me. On the other hand if they are all just optional and I have to pick after act 1 then I most probably going to pick 3 custom characters because those origin characters have not convinced me to be interesting for me, they don't have interesting builds and their drama annoys me more than it entertains me. Sorry.
