This only hides File::Spec underneath the covers. I expect I'd still encounter the same problems as I did before, as it will still stringify to the OS you're on. As I use Windows mostly, it doesn't integrate with Find::Find and others without some meddling.
I have most problems with code written by others who aren't aware of the problems. Whether they use File::Spec or Path::Class, I don't see any difference between the return values being Windows style and then breaking when used directly in Find::Find or File::Basename. For them to work correctly you'll need to have: