I think it makes sense to include "Topic" (first tag) and "Interface" (via steemit.com/busy.org/chainbb.com) to the bot.
The reviewers of Curie check if the author has already recieved >$25 post reward during the last week or not. This is to be fair, as their upvote usually shoots posts to >$150 range.
It might be useful to implement something like that to check whether the author has had a very successful post already recently so that someone else could get a boost.
Those are some damn good ideas you got there.