Lhamaen Ability

Is the only benefit Splinter Pistol (4+) becomes Splinter Pistol (2+)?

I honestly can't find any other use for her ability.

The part where it makes the Archon's poison better, yes that's it (it's basically turning his pistol into a Haemo's Stinger Pistol). It also makes the Lhamaean's pistol a 2+. In addition Lhamaean's have a 2+ poison melee weapon and as such gets two attacks each (three on the charge). Honestly while she doesn't buff the Archon much (I assume at one point the Archon had more options that made her ability more relevant or maybe at one point her poison helped the whole court or affected a wider range of items) she is probably one of the best buys out of the Archon's Court. Only 10 points for that many 2+ poison attacks is pretty sweet. If the court didn't require 1 of each choice, Lhamaean might have made a good cheap and effective retinue (maybe alongside a pair of Medusa).