I get it that the mess with plasma weapons was inherited from BI (and I'd really like to know what were they thinking when writing them up like this in the first place) but why wasn't this fixed either in errata or in subsequent printings? Sneak errata such as "Military Grade Plasma" in Ascension is always inferior to actual errata, and those IH plasma weapons don't look "civilian grade" judging by their prices and descriptions.
As for all those "same as corebook, cosmetically different stats" weapons, you said yourself the game is not just about combat, so why wast all the good space on listing dozens cosmetically different autopistols/autoguns/lasguns/whatever? Just short writeups of their producers and the few actually unique models would be okay. Customizing your equipment is cool, but being forced to choose between a weak autopistol from your home hive and a vastly superior Orthlack, not so much - it actually punishes people mechanically for sticking to a theme with their characters. And if someone is really hell-bent on introducing this much variance with the equipment, the superior way to do this would be introducing a list of modifiers for each weapon category in which the producer specializes, something along the lines of "All pistol and basic Las weapons by Sollex-Aegis add +2 to damage but lose the Reliable quality, and they interact with special ammo in the following way". Then, like I said, specifically list those few weapons that really break the mold, like Vanaheim, Meat Hammer, Nomad, Angelus, and a few more.