A few thoughts:
I love both of the Lugarugan designs. Both the Wolf and Werewolf are extremely well done, and people comparing about the DBZ hair? Come on.
Alder is a thing you know. I especially love the Midnight forme's sinister grin. It just looks great.
My type speculation is Midday Lugarugan is Rock/Normal and Midnight Lugarugan is Rock/Dark. I don't see why Rockruff would lose its main type, and while people might complain Normal isn't as "good" as Dark, Normal only trades a 4x Fighting weakness for an Immunity to Ghost. If D-Lugarugan gets an ability like Rock Head and can SPAM Head Smash / Double-Edge, it will still be pretty good. Would need a decent Fire or Fighting move for Steels tho.
Going on the theory the Ultra Beasts are based on the family members, UB-02 Expansion is linked with Gladion. Gladion is clearly making a "power" pose, always talking about taking people down, etc. Just like a conqueror.
As tenuous as this observation is, all the Ultra Beasts thus far are humanoids merged with invertebrate animals (Jellyfish and Insects).
I want to see what GF does with them before making a final determination. Are they like JRPG Bosses? Are they catchable? Are they plot events that for once don't revolve around you catching legendaries? Will you be able to battle them later in a simulator like they had in XD: Gale of Darkness?
I'm not going to knock it until I see the final execution. It's cool to see the franchise work in a new sentient life form that isn't human but doesn't really seem to be Pokemon either.