Resizing from all corners would be great, I definitely miss that on OS/X. I also prefer if windows have their own menus. However MS current situation is worse as menus are getting completely inconsistent from one applucation to the next.
Debugging Obj-C can be tricky, yes. One of the tools I like the most for code profiling is Instruments. Apple absolutely got it right when they ported Solaris' dtrace to MacOS X.