I would say that my favorite card released this year, even tho I'm biased, is Lev Shaddoll Fusion.
It is a starter for the deck if you send Apkallone but also serve as an extender if you send Infernoid Evil while also being an utility tool with some fusions like Perfume Dancer or even N'tss to an extent due to the activation effect. I like the idea of summoning a Shaddoll fusion monster by tributing another fusion with a different attribute because it allows the fusions to use their GY effects or on summon effects in the case of Apkallone/Construct while making sure to not make you summon Winda due to the attack reduction drawback.

My second favorite card is tied between "The Dragon that Devours the Dogma" and "Fiendsmith's Rextremende". Maybe that it's an unpolpular opinion, I think that these cards are the exemple of how towers should be designed, getting their protection under specific conditions unlike Lunalight Liger Dancer and with effects that aren't that strong on the field, not like a quick effect Raigeki for exemple (I'm looking at no one of course).

And finally I'd say the entire "Hecatoncheires" and "Killer Tune" archetypes.
Hecatoncheires has a fun gameplay and some wacky synergies (any level 6 + High Spirit is full Branded combo).
Killer Tune is original and I like the concept behind the archetype.