unlike nap diplomacy anyone in ally will not show up on battle. and you can see your ally legions members too(example:you have 40/50and your legion is 40/50 it will be 80/100) and there alerts.

I agree with the alliance option making them not show on your battle tab, but the second part of that is just making super legions which is what the current legion system is there to prevent.

+1

that means you do stuff for your allyy but tha apb bonus does not work