Hello. I thought that adding a "ward skins" tab in champion select would be a really good move. It could be placed next to the "skins" tab.
* Players would be able to purchase/change ward skins in champion select
* Riot would probably earn more money since the ward skins would be easier noticeable. (It's not hard to notice now, but you don't really watch ward skins before every game.)
* It's very easy to forget to change ward skins before going into a game, but with this you always have the option.
Also, ward skins are purchased with RP, so they are technically yours, and you should be able to change them whenever you want to. I am not a programmer or anything, but i don't think it would be too much of work.