They're going to replace the entire dashboard? Wow, for me that's a little too extreme. I'd be worried about something not being hooked up right, nicks while trying to reinstall, rattles, etc. If that's how GM is handling the situation for now, I'll live with the bubbles.
Good luck to you though. Hopefully your guys will do a good job. However, I also think the issue will happen again, eventually.
My car also only sits out at work--but that is 9 hours a day. And I do use a sunshade.