something that is so freaking distracting and equally amazing that bugs like these make it into such an amount of anniversaries, undiscovered or ignored that it already hurts. this issue has been carried over from 7 and i am not even sure if that is not there much longer.
for instance RebuildUV ignores previously selected geometry. i am pretty certain there are actually a bunch of these commands, if i have time and remember it i try to update here.