I think it's great that Gaydles are getting a new card, just like Aromages with Angelica. That means they're giving love to the one-shot archetypes. Graydles, Aromages, Digibugs, Shiranui, Tramid, etc. They seem to be tuners so far though, which is interesting, so my hope for a second Shiranui Tuner representing the Fire Sword in the artwork is coming close.
Anyway, as for your OP about G-Ks and Lunalights not being so viable, you can always use them in hybrid decks. Brilliant Fusion has a place in so many decks because the G-K fusion monsters have such wide applications, from using their levels for Xyz plays to using their actual effects (mostly Seraphinite).
Currently my favorite type of monster has been Fusion. They're getting so much support. ABC and Imperion Magnum are wicked strong, especially the latter being a 2-card fusion (w/ Poly still) for a monster that is essentially just a Quasar without the multiple attacks. Looking forward to these Amazoness support too, might make that deck decent.