These stats came out literally three days ago. This is way too short to add changes into a patch that was probably in bugtesting phase for over a week now, so well passed feature lock.
Also keep in mind that this extremely low rate is partly the fault of bugged organ guns on the current patch, which should be fixed in the coming one.
Portuguese are also a very competent water or arena civ, so it’s not like it’s a bottom civ across the board.
Now should Portuguese deserve a buff for land maps ? Yes definitely. But it’s not absolute urgent matter.