You know, it never, ever would have occurred to me to change a companion's class, because that's just not ever been an option before in any game I've played.

But now that I have the option, I want to do it eventually, just to see how it goes. Astarion bard, Wyll vengeance paladin, Shadowheart rogue... (those are just off the top of the head, not thought out at all)

Just to see how it goes. Because why not? It just makes everything feel more like in-person tt. And if the dialog breaks... then as Barchus Root would put it, the dialog will have broke. It's a game, the point is to play with it, and we're getting very interesting, novel ways to play with it.

If the depth of immersion is key for you, then ignore the option. If not, it's an extra set of knobs on the board.