Facing your healers (or for that matter your group) while tanking is a good idea in general.
First of all, it becomes painfully obvious when you don't have aggro without any UI mod, because anything not on you is facing the other direction. What this mod would allow you to do then is distinguish between mobs lost to rogues & other DPS classes (i.e. their own damn fault) vs. mobs lost to healing (which you need to do something about regardless of blame).
Secondly, if anyone else in your group is doing physical damage, they will do more to an exposed back due to fewer parries (and perhaps other advantages to an exposed back that I don't recall - I know that not only rogues benefit).
Finally, if you get adds and you're the closest one to the adds, they will default to you - giving you that rumored extra bonus to aggro by being the original entry in the mob's hate list.
Granted, I don't remember to do this 100% of the time (especially when being on the far side of the mob puts me too close to unlinked adds), but in principle it's an excellent idea.
First of all, it becomes painfully obvious when you don't have aggro without any UI mod, because anything not on you is facing the other direction. What this mod would allow you to do then is distinguish between mobs lost to rogues & other DPS classes (i.e. their own damn fault) vs. mobs lost to healing (which you need to do something about regardless of blame).
Secondly, if anyone else in your group is doing physical damage, they will do more to an exposed back due to fewer parries (and perhaps other advantages to an exposed back that I don't recall - I know that not only rogues benefit).
Finally, if you get adds and you're the closest one to the adds, they will default to you - giving you that rumored extra bonus to aggro by being the original entry in the mob's hate list.
Granted, I don't remember to do this 100% of the time (especially when being on the far side of the mob puts me too close to unlinked adds), but in principle it's an excellent idea.