Riot is taking more and more ideas from Blizzard....
Emotes. The feature that was added in Heroes Of The Storm some time ago.
First they try to make match length shorter like in Heroes Of The Storm.
Then they add recolours like in Heroes Of The Storm.
And then they also take from Heroes Of The Storm the idea of capturing a jungle camp to make it push the lane, and now this too.
Now they add emotes just like the ones in Heroes Of The Storm.
I love both games, but since League's the one that came first, I'm glad to see that HotS is doing so many things right that even League is taking inspiration from them.