You have to take into account that the fighter design in Macross reflects the design philosophy of current military fighters and product design. So the YF-30 looks like a hybrid between a F22/F35 and an Ipod . And the VF-0/VF-1 looks like the F-14/15/16/18 that were popular during the early 80s. Macross Plus/7 planes have design elements from the Eurofighter/Rafale and some stealth palnes (especially the canards).
Valkyries have also reoccurring themes. There are the angled dual tail fins, the arms between the legs, adjustable wing span attachable and bulky armor and a Gatling gun inside an old fashioned bomb casing.
That said I guess the next generation of Variable Fighters will look like the current drone design (Predator/Global Hawk) with armor patches and missile pods all over it.
You see the reason why I got in the toy collecting hobby were the few transformer toys I had when I was a kid. And I always wished that the toys would look and handle (transformation/articulation) like in the show. And I feel like the current Bandai and Yamato Valkyries as well as the Transformers have reached a sweet spot with the Valkyries on the upper end and say TF Prime Dreadwing on the other end. So my childhood wishes came true and I'm satisfied. So if the next step doesn't please me I can look at my Frontier/Masterpiece shelf and the world is o.k. until the next truly awesome toy comes around. Hobbies work that way I guess.