Either leave the old splash arts or DRAW A NEW ONE.
STOP using the chinese splash arts, they're horrible, cheap, and extremely cartoony.
You say it is a short term solution to updating skin arts, but to me and to some of the community. It is not a solution at all, because it takes the quality of the skin down to the bottom.
The chinese artstyle doesn't even fit league of legends at all! They lack quality in every possible way. They're so anime-like (no offense to weebs, I do love anime just not on league) and that doesn't fit the game theme at all.
Updating atleast 5 REDRAWN, REDONE, or RENEWED champion skins every year is 10x better than putting 60 chinese splashes in a week.