@Riot: Regarding Urgot skins

I want to ask something about skin development for Urgot: Is he considered to be way harder to make skins for than the average champion?

We know that some champions get skins less frequently because they require either more work (Illaoi, Zyra) or are hard to make skins for (Zac). I could imagine that Urgot falls into this group, because of his unique model requirements with the leg mechanic.

Is that the case? I don't know much about the work process of skin development, so I would just like to know.