It's a cute idea, but the concept of the like system is good as is imo. Perhaps someone could edit it in as a fan-theme. (I've seen ones that remove certain aspects so maybe it's possible to edit like to yeah)
A like counter is a bit more addictive, I think. Lots of people put emphasis on their amount of likes, and it seems to generate a positive psychological reaction. Dislikes/unyeahs/that ilk shouldn't be added, either, because then you get into a reddit circlejerk kind of deal.
Miiverse is dead, and I'm sure it's sad to the people who used it, but I can't see wanting to tribute to it outweighing the other things that come alongside it. (It's also probably look weird/clunky with more options, and it'd probably be a hot mess for the mods to deal with when first introduced hypothetically.)