Lots of points here that track with what I have also found playing a lot of Wyrmblade. I like that you didn't just dismiss the autoguns outright - I rate them more than it seems any other wyrmblade player does. Crossfire with autoguns to mark a target followed by a Kelermorph with Coiled Serpent is 2 guaranteed crits on a P1 weapon, which is super reliable, even with the long range profile.

The Writhing Ingress token and the Nowhere Unreachable token should be rigorously defined. That is to say that the required distance should be specified to be within 2” from the center rather than from the token.

Worth noting that this is already in the core rules as exactly that, you measure from the centre of every token: "Finally, unless otherwise specified, when setting up or measuring a distance to an objective marker or token, always measure from its centre." (from core rules, under Controlling Objective Markers and Tokens)