Did any paradox dev mention anything at all about expanding the new missions at all? I seem to run out of missions by 1600 at the latest unless one has a date specified.
I haven't been in this forum as much lately since I have too much anime and other games to play so I don't know what to look for around here for this information and searching "missions" gives too many posts
They are adding more nation specific trees in the next update similar to the British nation trees that require Rule Britannia (Indian missions for Dharma owners, Russian ones for Third Rome owners). Haven't heard anything about extending the generic trees though.
Question, if I'm a Tributary of Ming and attack someone allied to Ming, will Ming join in as a defender?
Yes, assuming they would normally join the war. The gain from being a tributary nation is they won't interfere when you attack other tributaries.