I do like the idea of keeping the reactions down to a small number of canned responses. On the chat systems, there are often a few hundred to choose from and the list is just a bandwidth hog.
Streamlining the options seems to be the best for reader engagement, author encouragement, and faucet CPU cycles.
You thought this out well. Maybe you should be a top Steem ambassador or be endowed with some extra kudos from the community?! You should run for office!