Wrangler Yeah you're right about how time consuming it can be to flick between, but at least you have a grasp using C2's image editor.. I use it for throwing graphics together to test a mechanic or whatever and those graphics are nowhere near what I can do in Photoshop.
Yeah I agree about onion skinning. That would be nice to have but I doubt that's even on Ashley's todo list :}
Ashley I know it's not a priority, but surely it'd be easy enough to add an indicator to show the colour selected in the picker window? I think it's long overdue ;p