Someone convince me that focus target is worth taking

When playing psyker, i swap weapons all the time, just to use them regularly.
Swapping weapons on vet, every 10 seconds in order to gain a massive melee buff, seems completely fine to me. You likely will have something to shoot every ~10 seconds anyway, when playing on damnation+. And thanks to the guaranteed crit on first shot, it is quite likely that you can 1-2tap the target (with some of the guns).

Well you do have a buff indicator that shows you how long it lasts.

Well that sucks and is quite clearly a bug.

I would assume that this is intentional.
Just that many of FS’s descriptions are bad and some are flat out wrong.

Ok. You are free to disagree.

Although i do not understand why you would say that (use taking a lot of mental space and busy work) about a keystone that literally only requires you to tag enemies (which you should be doing anyway), to keep a 12% dmg buff active on everyone.

Or about a keystone that applies a buff to the weapon that you just swapped to.

Aside from that, if keystones are to be part of the identity of a build, they are to be somewhat gameplay relevant, no?
So if you have to do slight adjustments to your gameplay, in order to gain full benefit, that woul not be an issue at all to me.