First of all I'd like to congratulate the team on this amazing mod, it's what Age of Empires 3 should have been and more, keep up the good work.
I'd like to suggest a change to the Maltese Arsenal/Advanced Arsenal structure.
As the Maltese is the closest thing we have to bridge the gap between AoE 2 and 3, would it possible to replace the Arsenal with a Blacksmith?
At the moment I feel the Advanced Arsenal card is redundant for the civilisation as it has the same upgrades as the other Europeans, most notably gunpowder upgrades.
I feel that a blacksmith building would better suit the Maltese, as well as be a nice throwback to AoE 2.
Upgrades from the blacksmiths would focus on Archer/Melee/Cavalry attack and hitpoints, much like it's predecessor, and an advanced blacksmith card could add something like the 'Chemistry' upgrade to further improve ranged attack.
I'm not sure if this has been suggested before, but I've always felt the blacksmith was a missed opportunity ever since playing the first campaign of AoE 3.