Yeah, basically, what we WANT is something like the VB debugger, where you can step through, line by line and check which line it's on and the values of variables. But then again, that's the best debugger I've worked with and I understand that it'd be difficult, if not impossible, to implement.
In general I find C2 to be very good to use and it massively increases productivity. Unfortunately on bugs, I'm finding they're far harder to find than a normal programming language. It's sometimes next to impossible to work out which events are even being processed. Even a basic debugger would be nice.