This just sounds like a regular linebattle am I missing something orrr
The point is to have coalitions forming on their own with regiments which/like know each other and have them compete against other coalitions of the same type. Regiments which would like to participate but don't know other structures they could partake with can sign up alone and they will be matched up with other regiments in a similar situation. Though, in the case of NA, I reckon the community is small enough so that you can organize yourselves beforehand.
It's the regular line battle format though, yeah.
It just sounds like you are pre-making the teams for the event, and then doing a regular linebattle.. sounds a little lame and wouldn't really work for NA especially now imo.. not to shoot down your idea there..
I think what would work more for NA would be bringing back 2v2s/3v3s between regiments (line infantry), that actually encourages teamwork and communication, and the skill/numbers balance is not hard to even out.
Basically it actually has communication between the regiments as they agreed to work with each other and such
Regiment leaders can and already do communicate between each other's regiments, what is putting them with specific regiments going to change?