When I build troops I don't want to have to muck about doing some in one Barracks, some in the other - It'd be easy to balance things between them automatically would it not?
Nah, it's crap. If you want to build 6 troops, the quickest way is to manually build 2 in one barracks, go to the next one, build another 2, then go to the next one and build the last 2.
The game should automatically balance it, but it doesn't.
