Ok not gonna be so radical.
Changes:
New Unique Ship Nau.
Replace Organ Gun for Berço Canon
Aventureiros: Heavy Melee Infantry
Fidalgos/Acobertados: Melee Cav
Replace the free Towncenter for a Feitoria, that acts as a weaker fort cant train troops but can garrison some troops and can train Villagers.
Effective for map control and rush defence.
I would argue remove pikeman, and make an Age 2 Halberd, Ordenancas for Portugal.
Portugal used a lot more Halberds than Pikes in the Ultramarine Empire.
Cant really make a case for Dragoons.