That's part of the problem but it's not a problem that's exclusive to Ming. I recently got my arse kicked by Transoxania as Russia because they were ahead in mil. My tech discount was only 5% behind time and they had not embraced as many institutions. It's not that uncommon to see someone like Malacca also up there in terms of tech in the late game. Or Indian majors if they get some institution spread.tributary monarch points must be removed ming is only ahead because of this :/
Ideally I'd want to see tech drastically made more expensive east of the ottomans and south of north Africa. But to balance it out I'd give them drastically bigger manpower and force limits.