I guess it's just the Focus Ability that you won't get to use. But otherwise, I think it's an interesting build to explore. I think the earlier comments have already some of the benefits the specialization has when building a Dual-Wield Rogue. Of course it's granted that you have to pass through Spike Trap to unlock the better part of this Tree -- I don't see it working for a Dual-Wield at all given that there are far more better Skill for both Offense and Defense in the Base Trees.
If I were to build my DW Artificer, I would probably get. Twin Fangs, Flanking Strike, Evasion, Stealth, Fallback Plan, Elemental Mines, Spinning Blades (Or Deathblow). I think it's either/or for Spinning Blades or Deathblow, as I've read that the second is wonky. That leaves you with one last slot, it can be Spike Trap but I'm thinking there might be other things that can be placed.
Given all the flak about the other active skills in Sabotage and Subterfuge Trees, I don't know if those Skill are worth investing on using Artificer. Poison skills might work well since there are Passives in the Artificer Tree that improve Duration but it's not that all impressive.