Since he was signed, I've been intrigued by the power potential of Dalbec filling one of the corner spots on the big league roster.
I'm not expecting him to come in and magically become an all-star, but when are corners are usually Hoskins, Durbin, Frelick, and Collins adding some occasional thump would be great.
If nothing else, having the option as a bench bat with some slug would seem to outweigh what you are getting from Daz Cameron. You're correct that once Mitchell comes back, the roster gets a lot tighter which is why I would make the move now to at least see if Dalbec could get on a hot streak with some playing time.