So I got into CBT4 and just played a quick 30 minutes of it. Game feels like Neverwinter Nights in terms of combat. You can swap classes whenever you want. You seem to gain xp while playing a class and you unlock abilities and shit. Apparently there is a grid where you character progresses come together to unlock new classes.
Combat is fun, if you liked NWN you'll like this.
It's probably grindy as fuck to unlock classes though and a lot of repeated content.
You can also change your appearance any time you want, so all you really need is one class and you can swap in and out of everything.
It's sci-fi romans in space, kinda cool.