What if you migrate the past icons with emotes in the emotes tab!

for example, the past worlds icons/baron icon for an emote. instead of removing your mastery badges key for this emotes feature, why not just migrate them into the emotes tab?

pictures of this icons:

https://lolstatic-a.akamaihd.net/frontpage/apps/prod/worlds-2017-hits-the-rift/en_US/5d37075b99f9b5132a2d175d8b76286fee6e6b24/assets/img/worlds-emote.png

https://3.bp.blogspot.com/-ULWlw-_gOzk/WYIpzglQ2SI/AAAAAAAAqlQ/a9SGH43vmHoHoLhL-JzvM1dDS4bCmhs6QCLcBGAs/s1600/emote.png

https://cdn.vox-cdn.com/uploads/chorus_asset/file/7647267/crafting_icons.PNG

and put these icons emotes here, and use them without equipping an icon:

https://cdn.vox-cdn.com/uploads/chorus_asset/file/9439337/Screen_Shot_2017_10_11_at_12.12.45_PM.png