Daily reminder that Castile gets a whopping +15% Land Morale for conquering the North Moroccan coast (Doesn't help the fact they get claims on North Africa after taking Granada, which usually happens by 1455)
This means that after the first war, a Castilian victory over Morocco tips the balance irreversibly in Castile's favour (which already starts the game stronger and will snowball into far stronger) and leads to an innevitable Yellow North Africa.
Historically Castile literally only conquered Melilla from Morocco (during this game's timeframe) in 1497, and according to the treaty of Tordesillas, Morocco was entirely under the Portuguese sphere of influence and claimed by Portugal (The Conquest of Melilla happened before Tordesillas was officialized by the Pope, in 1505), so really the conflict should be exclusively between Portugal and Morocco (Which is a far more balanced conflict), like it was historically, Castile shouldn't be able to get claims via mission there so easily, if at all.
Its actually weird how Castile's missions are far more geared towards a conquest of Morocco than Portugal's, and far more rewarding as well, despite the conquest of Morocco being an exclusively Portuguese ambition (and partial reality).