Legacy skins should become a legacy concept.
At first, Legacy Skins seemed to be introduced to weed out the "palette swaps" and some of the really lame skins of League of legends (Such as Frozen Shen). However soon after, they'd just dump a bunch of stuff in the legacy vault for the hell of it, maybe the skin is old or something. It almost never made sense but it was a way to make a quick buck with their announcement of which skins would be moving to the legacy vault.
But ever since Champions got these VU's, the idea of legacy skins have seemed ridiculous. Starting with around Poppy, where they made even her most outdated skins interesting. These were no longer "legacy skins", they were new skins. But if you missed that one week after her relaunch, you have the option of 3 Poppy Skins (Out of 8!).
And then chroma's came out, and suddenly the palettes swap concept behind making skins legacy didn't make any sense either...
So what are legacy skins now? They are just a way to sell loot boxes and flash sales, that's all they are. In the case of Boxes, that legacy skin has a 1/800 chance at best of dropping. Can't use lootboxes to get what you want. They got some value but it's pretty much just a random system. Even with the improvements to loot boxes, it's not a way to get a legacy skin (Unless, you want to spend around $1600?).
So really guys, I don't get it. They update the skin, they update the splash art, it's new. It's not legacy. Sell it for one week, after you have to win the lottery? Why not just - when the skin is updated splash art, updated model - I dunno take it out of the legacy vault?? Because you know, it's new. It's a new skin that is not legacy anymore. And the system stopped making sense years ago anyway.
I wouldn't even be mad, they got plenty for sale, it's just cosmetics. Look, I get it. But after years and years of seeing them do this, it's just annoying. It's an insult to the customer. If I wanted to buy Vandal Twitch, I'm not going to just buy Kingpin Twitch. $10 becomes $0. The system instead caters to all the fools who don't buy things they want - they buy things because they might -lose the chance-. Classy.
I'm not talking about event skins that are tied to things like Season rewards, Christmas, Lunar Newyear, etc. That's all fine - those make sense and most of it is on sale once a year anyway. I'm talking about the legacy skins that have no reason for being so other than to make money by dubious means.
edit: I'm talking specifically as the skins Riot classifies as "Retired". You can look up the list if you please.