Apples and oranges really. My TF toys (MP OP, ROTF Leader OP, HA, Binaltech) were all confined to a bin while my yammies are permanently on display. Don't get me wrong, the TFs were fun to play with but in terms of engineering i believe the word "kibble" is synonymous with TF. The main design difference between macross and TF toys is that while TFs only need to get from one form to another, Valks need to do it while still preserving the utility and pseudo-realism of its parts, ie cockpits doesn't collapse or split apart. This need to rationalize the transformation means additional parameters in the design, which in turn may require more creative solutions than developing plastic origami. However this design requirement is only a reflection of their respective mythologies, which brings me back to the first sentence in this paragraph.
Edit: Oops for getting OT.