Agreed.
In fact, the only thing I didn't really like about the GB films was Dana.
She was okay in the first flick, served a purpose, but it did seem a little too convenient that she managed to be the focus of another extra-dimensional super-ghosty in the sequel.
A GBIII cameo I could deal with, but (just in my opinion, don't get mad) Weaver was one of the main problems with GBII. Waaaay too much screen time devoted to Dana. I just don't find her all that likable or sympathetic or anything.(*rant)