pressing TAB to change targets doesnt work

From what I can see in today ptr, this feature was implemented.

One note about WoW tab targeting: pressing shift + tab will do the reverse order of the tab targeting. I think ordering is done based on distance BUT it only ever selects units that are actually on the screen. So it's screen based ordered by distance (I think).

He is apparently already implementing that feature ! :D https://www.youtube.com/watch?v=18g8rslbuP4 8:39

This feels like a suggestion for a feature and not a bug