How do you think they are nicely balanced? I sometimes start within 100 yards of the enemy, well within arrow range, and they get to me in less than 30 seconds. If I approached them actively, it'd be about 15 seconds.
After extensive practice, I have developed muscle memory to put my troops into square and send them onto a nearby hill, a little before the cavalry arrives, when they spawn less than a minute away from me. But you definitely cannot do that in time if you're learning the F-keys, as many players will be.
Alternatively, we could just bring back the minimap and tactical screen. That tends to make formations and troop management a lot faster. And you could add some total-way like features where you drag formations to decide their depth.