SG Udyr is like 2016.
And it is appealing. That's the problem. Unlike other Udyr skins of the time, it offered a story, and each form didn't look flat and dull; it looked vibrant.
Most new skins for champs like MF or Ezreal and definitely in Lux's case, were designed NOT to outshow the Ultimate skins (until lately for Ezreal).
None of Lux's post ult skins have been better than her Elementalist. Lunar looks like a weak copycat. Academy has flat singular effects.
Ezreal's was just so early they didn't really make a good skin. Udyr was the first success.
I do agree with an Udyr VGU, but it's going to be hard to update SG in a way that beats Dragon enough for the price disparity even then.