I love the idea of being able to take that one weapon and just keep boosting it up so it's useable *and* doesn't negatively impact your PL by being so far down the number pit that the other numbers laugh at it, and pretty much agree with you in that regard - down to being able to slot in various items - sigils and other little decorations - to effect the stats (or maybe even tie the RNG'd status lines to those). If ever they were to take one idea I've read, this would certainly be up there as a way to make me more prone to wanting to craft things since it wouldn't inevitably feel like a waste when a good stat line got replaced with a higher PL weapon because I needed better things.

I don't think I'm so much on the same page when it comes to weapon distributions and the likes. If the only weapons we found the majority of the time was chainswords, bolt pistols, boltguns, and lasguns it would get stale very fast - although I guess it very well could be argued that it wouldn't really change up gameplay that much in the hands of enemies if they all had autoguns or if they all had bolters. Our own acquisitions though, being the inquisition and all, are probably far more lenient than what our enemies would have. Of course, if all you ever picked up was lasguns, then the loot-hungry would quickly loose interest in the game and you'd have less of a reason to experiment with different guns because "oh hey, I just got this thing lets check it out." What I'm saying is on that front it leads to more variety instead of things getting stale faster due to the further missing variety.

As for the tabletop side of it - a lot of stuff done in that is to resemble some form of balance, and no greater example is that fact that a lowly guardsman with is laspistol can still kill a heavily armored imperial knight just by shooting it enough. Same thing happens a bit here - so we have to take some of those things into stride with that in mind. Yes, in a normal tactical squad in 40K of generic space marines, 1 in every 5 man squad can have a heavy/special weapon - not including all the fancy sergeant specific items. If we were to talk about the fancier Sternguard, than that would be 2 in every 5 that could have a special/heavy/combi weapon not including the sergeant. Factor in on top of this the names of what we are fighting - flamethrower marine? Oh, he's called a Havoc - the Chaos Devastator equivalent (heavy weapons), whose whole squad (assuming it's anything like the loyalist format) can select from the heavy weapons list. The hammer-marine? He's a champion (which, honestly in the SM got limited down to just power sword and a "champion's blade" kind of deal, but considering that's not much better than most sergeants I feel the hammer is totally a bit cooler to be getting attacked with). Now, I only have the Marines (and Grey Knights, who kinda turned into their own thing in the more modern editions) so I can't speak exactly for the guardsman or inquisition proper, but I think that helps kinda point that out there at any rate.

Really liking  the idea of cleansing battlefield drops at a cost of course also think your upgrade idea is spot on being able to take one off one mod and latter use on another weapon fits perfectly into place with 40K lore

I dont and wont play assasin so I cant say anything about it.

About weapons, I understand what you mean but for example I use bolt and plasma pistol for a long time. I like them and probably I ll use them when the final version released. Maybe there are inquisitiors who love theri las and auto pistols so the balance of them must be preserved.

I totally agree with you in crafting. I cant understand how a pistol give me tougness or virtue. Maybe relic/arifact class weapons may give bonuses but every item giving some bonus kills the lore imo. I always hate the idea of items make the man/woman in these genre though I love the game as it is.

Also upgrades like scopes, extended magazines/capacitors, laser sights, etc sounds better than current system.

Also agree with you about missions give bonuses for fully clearing the map.

And about currency, an inquisitor who can order exterminatus shouldn't bother with credits. He/she should spend renown/influence kind of currency which he/she gains from doing missions not from kill drops. But maybe use current currency when conducting investigations for bribing, buying information, black market like actions.