[@Eisenhorn]
Yeah, though even the standard issue PDF and Guard will be trained to a very competent level by their local commanders and whatnot, so all should be at least as competent as a standard modern day army. I mean, they can hold the line against pretty much anything if they have enough men and firepower - that goes for the PDF as well. Seriously, it makes no sense that the armies of the most powerful empire in the galaxy should be competent at least. 

Stealth is a pretty broken skill is most games systems as it is, but those cloaks make it insanely hard to get detected by even bloodhounds - maybe not, because I imagine after being the field for long enough you start to smell like a half dead Grox, but yeh.

Yeah, honestly. The way I look at regiment making and character making, is to make them GOOD at what they do - not the best, but at least highly competent otherwise it wouldn't be their job. It'd be like giving some pencil pusher an axe and expecting his to fight a Khorne Berserker - it just doesn't work out. So yeah, I understand covering your bases.