When you started talking about the floating particles and how you couldn't do that in Medieval 2, it quickly reminded me of when you first brought up the concept of Creep several months back when the change from M2 to 0AD was still under consideration and not a done deal.
The thought of using the Creep mechanic to make the Gohma even more Zerg-like is one that fascinates me greatly. I haven't really been keeping up with the mod since the switch to 0AD so I wouldn't know if this has already been discussed to death but, hell, you might even be able to give the Gohma Shroud Walkers the ability to spread the influence of the Gohma/Sulkaris and have their status as a mobile Hive Node create some sort of Creep.
Speaking of Hive Nodes, what even are they? Are they superorganisms?