I don't own Stardust Memory whatsoever. I just watched the entire thing on Adult Swim way back when. In any case, the problem with the mecha designs was that they were too powerful. In fact, they were better than some of the designs featured in Zeta Gundam, which is why the last episode had the data deleted on the entire GP series. I mean, the GP-01Fb is one of the most mobile Gundams in UC until around CCA to F-91 era, while the GP-03 Dendrobium Orchis can take out Mobile Armors in the Crossbone Gundam era, mainly due to its powerful ballistic weaponry and the fact that future Mobile Armors are reliant on their I-Fields.