I don't want to see companions break (yet). That's fine if we get the 17 NPCs like we had in BG2 but with only a handful of companions, a companion going their own way means a broken game.
Something needs to make Tav McBlanderson * a compelling character. Perhaps instead of everyone being freed because of damage to the ship perhaps Tav could flip a lever that opens all the cells at once? Then everyone we meet would start with "wait, you're the reason I got free"
*( I stole that)
That thing that's supposed to make your custom character compelling is called imagination. If we're going to call for Larian to write them for us, we may as well just petition to remove custom characters, because that's essentially what you're asking for when you want someone else to define them for you.