Thanks! The goal was to make them all look like Gryphonicus titans, while playing up the fact that even the smallest are unique god-engines that've been at war for (as of the HH timeline anyway) hundreds of years nonstop.
As for support, ironically enough (especially for me, the lover of mass battles that I am) AT is basically a really crunchy skirmish game - a handful of models per side with detailed status tracking and lots of customization. While I'd
like a new Epic, it is what it is. (OTOH, they are - for some reason - planning on re-releasing Aeronautica Imperialis in the same scale in the not-too-distant future, so maybe that's a sign of things to come.) But, like with AT1988 and Epic, they'd really need to revamp the rules to include anything smaller than knights - it's really not built to handle any weapons weaker than a vulcan mega-bolter very well.
Side note for anyone interested - the plasma glow is one of the Contrast paints, "aethermatic blue" in this case, and it worked basically as advertised - a very simple way to more-or-less reproduce something that I could've done with inks and medium on my own, but that would have been fiddly. Worth the 1000 yen for the pot? That probably depends on how much plasma I'll be painting moving forwards.