No that's not it sadly, because it puts my current target on focus and it swaps my target with the person who i already had on focus...
The idea which i had in my mind is that I can target my friend in arena who am i healing and just cycle focus from 1 enemy to enemy number 2 (considering that im playing 2's)
Put it like this, my focus doesn't change when i click tab and when i click tab 2 times it changes from 1 enemy to another meanwhile my focus doesn't change at all.
Now replace the idea of the Focus being my target and the targets being my focus.