I don't mind waiting for things to be fixed what with life interfering with things, but I can't find any activity from Ernest lately. He hasn't been, like... hit by a bus or anything terrible like that, has he?
Maybe it's time for Kbin and Mbin to be a single project, in the end they are the same thing, just that Mbin has more people actively working on it, so they are faster with pull requests. There is no big philosophical problem, just a maintenance one.
Are you sure that's not just because mbin was syncing changes from kbin? https://github.com/MbinOrg/mbin/pull/231 seems to be the only commit ernest has actually made to mbin directly