Im completely fine with the mechanics of gettng behind a mob. its very easy to do without pointing a mob at the party. you just run throuh mob activate ws on other side whike you have your char run back as soon as ability is.proc'd and thus you got your combo. there isn't anything wrong with how the combos work for pld/gla as far as comboing from the back its all about timing. hopefully they keep combo direction qualifications as they are as they do add to skill requirements for a "good tank"