I would disagree with this statement only based on the 1/100 and 1/200 scale models of the Regults. (perhaps they are not acurate, and thus my confusion) but the Lg and Sm missile pod seem identical to the standard regult minus...well the missiles. Standard regult in the 1/200 model is identical with two antenna that go in the hole where the missiles would go. This is what I thought Yamato would latch onto...similar to the 1/60 line and QRau...they could make 1 model (standard Regult) then minimal mods (more then color, but comparable to doing the armor say on the VF1 series) to release the small and large missile varients. Then, considering the success of the Low Vis perhaps 1 other custom version (or 2) could be released. Different paint job, weathering or what have you. The Scout, finally, would be akin to going to the Elint in 1/60. Would be a whole mod...with only really the legs being reusable for the new one...but having those down and all the kinks worked out means you only have to design and do the body....this one, of all of them, I could see them easily skipping based on sales.
Glaug, well thats a whole other problem...but the Glaug is arguably the most popular here in the US. Due to ties with Battletech you still see 1/72 scale model Glaugs selling for $100 or more while the rest of the market has dropped some.
I sure hope the QRau does well and they keep doing the other "enemy" mecha.