Use of Focus

No it's not. I asked for this on the European suggestions forum.

I doubt we'll get it as it would be imba! Particularly for multiboxers :)

Djarid called out the best reason for using focus (in my opinion). You can't "accidentally" lose the target when you use focus to target something.

Bottom line is that you want your clones to always be able to shoot the target of your main. Focus is the best way to do that.