I failed the strength check despite being a paladin and using inspiration. I never saw him again even after getting through nearly all of act 2. I’ve asked this before, maybe even in this community, but no one gave a concrete answer, likely because the game was still new.
I wasn’t aware, but I don’t think you can kill the tie flings and keep Karlach and Wyll, that would be a fine example of losing characters due to the “consequences of my actions” still and I see no problem with it.