As a career thief I just can't really relate to this issue. Now, I understand how you really don't want to be standing behind some mobs, or how environment can occasionally prevent you from getting behind them, but usually, as long as I'm not tanking, positioning for a SA has rarely been an issue.

I do however like the idea of allowing a greater number of mobs to be affected by hide. As it stands hide's usefulness in dropping enmity is limited to a small fraction of mob types.