When buying the mystery skins in the new client, it says loading, and then disappears. When you go to account, then purchase history, it'll show you what it gave you. However, there has not been any animation set up or anything for this feature. ALSO!!! When purchasing these mystery skins in the new client, and then closing it out, and opening the new client, within 30 seconds you get the whole lined up set of animations for all the mystery skins you bought, which locks up any other action until its gone through all of them.
-Open store in new client
-Buy a mystery skin (or more)
-Close out new client
-Open Legacy client
-Wait for at least 30 seconds (I hit play and then was almost able to start a game before the animations started)
Nothing major, just thought it should be noted. :)