GGMF isn't an Ultimate Skin - it's a Legendary Skin with 3 Chromas that you're forced to buy.
- Ignore the fact that MF really didn't need another skin.
- Ignore the fact that AD Carries now have two 'Ultimate' skins while Top Lane still has none.
The issue is that it's not an Ultimate skin - it's merely a Legendary Skin with 3 Chromas that you're forced to buy.
GGMF costs 2775 RP. A Legendary Skin costs 1820 RP. A Chroma Costs 290 RP. Base GGMF + 3 Chromas should cost 2690 RP. The ability to change the chroma in-game when players will simply prefer one Chroma (I'm 99% sure this is the case with DJ Sona and Elementalist Lux) is worth sweet fuck-all.
The simplest solution would be to admit that GGMF is only a Legendary Tier Skin. Most people don't care that it's so expensive - they care that you took up this year's Ultimate Skin slot with a Legendary Skin that has a few Chromas on release.