Can we please have another way to get chests?

I am a solo player. I have gotten all the chests on keys for champions I play often. I do not want to play other champs for the fear of losing my touch on the ones I play often just for an S once. I also have 8 keys.

Can we please get another way to get chests??? Maybe an exchange on keys to get chests??? Maybe open the requirement to anyone on your team to get a chest???? Maybe even just make them purchasable with a large amount of blue essence???? (i.e. 1000)