>>273543589
>different hands
Kind of? The right hand animations will overwrite the left hand ones. For mine the sleepy eyes emote has every other eye related shape key set to 0 and every other emote with eye related shape keys has the sleepy eye shape key set to 0 so they don't merge into some weird double closed eyes.
You can use the merging of two shape keys to make a new emote but not have something like fingerpoint left hand do something different to fingerpoint right hand.