At this point, just make a Neon Strike Irelia skin.
Since Riot wants Frostblade to actually be ice-themed while the playerbase wants a pinup girl... just go through with the ice-themed skin and release a Neon Strike skin so you can justify the slutty jumpsuit and the tech-y bits people want.
And, as people are saying, maybe just give the Neon Strike skin to angry Irelia mains who bought Frostblade (pre-rework announcement) for free, or dramatically discount it.