Can't we just trade champion shards for a skin shard ?

Hello Guys As a player who have all the champions and all the level 7 unlocked what should i do with the champions shards ? BE maybe be useful sometimes but what about this champions shards that is the core reword for the leveling now ? so my idea was reroll these shards into a skin shard maybe a lot of them MAYBE A HUGE PACKAGE i dont mind something like 50 champion shards for 1 skin shard ! i will still be ok with it so what do you guys think ?