I'd like to be able to hit Control-Command-P and always have the "Switch to project" window pop open (perhaps re-dubbing it, say, "Quick-open Project"?)
In other words, I think this window should open regardless of whether I already have a window open or not. If there is no window open, you can't switch to any project quickly, without having to open the operating system's file open dialog, which after all is quite a drag. (I hope I'm not having this wrong now, if so … )
If this wish is ever met, here's one supplementary addition: providing a user setting that allows you to define, whether or not you'd want new project windows to replace current ones (if any). There are a few one-window-lovers among us who may prefer having only one project window open at a time. Yet some (e.g. large-screen users) might prefer multiple project windows.