How come force weapons count as good quality in the hands of a blunt, but not in the hands of a psyker? The wording in The Inquisitor's Handbook seems to suggest this (though it's not explicitly stated), but it bothers me. In terms of in-universe reasons, I suppose one could imagine that drawing the warp energy through it takes a degree of the psyker's attention and... okay, I'm not 100% satisfied with that explanation.
In terms of game mechanics, it seems to me that they'd be pretty overpowered compared to, say, power weapons if they were good-quality at that price, in addition to the other benefits psykers get. Would it not make more sense to just up the price and have them always being good or best quality? Am I missing something somewhere?