Update it to not be ass. It's a LOT of filler missions for not a lot of reason.
Definitely go quality over quantity.
Overall theme should be the same: reach historic borders in asia, africa, and spain.
Add in stuff about retaking islamic southern italy and finally conquering austria. a side mission to destroy the HRE would be pretty cool though it'll need to be done before 1600 to matter.
Missions to ally a muslim nation owning sarai, or a nation with sich rada or horde gov't in order to access asia trade better.
Focus on buffing constantinople node somehow so trade can't leave it (if you think that's needed).
Military tree focusing on siege cannons, drill, and overall quality that is locked behind achieving certain conquests.
Allow conquest missions to be completed by them OR by muslim vassal/tributary. Allow tributary(?)
Update it to not be ass. It's a LOT of filler missions for not a lot of reason. Definitely go quality over quantity.