Only that now I keep my slingers and skirmishers behind my frontline now. When I'm playing Rome I still use the historic Hastati-Principes-Triarii, with my cavalry evenly divided among the flanks(if odd, favor the right) and after the animations pack patch the crouching Triarii would be fracking awesome. I'd just rather now have the gaps in the lines when retreating my skirmishers, and I mostly use slingers anyway, and they have the god of all missle ranges. They don't need to be kept up front. For seiges, though, Hastati go in first to clear the gate, then get out of the way as the Triarii move down the streets to the town center. Then I bring up Hastati and missles behind them, and leave my Principes for rearguard(I've had cavalry come down the streets from behind me countless times, and Principes can usually hold their own while the others advance. If they fall, I send in the Rorarii while I swap the Hastati and Veles. God, my Rorarii always get the sh*t jobs)

I noticed that I'm not attacking as much anymore. I set my legion to guard mode and bring myself into range that the enemy will attack me in. It works with the Romans, but not so much with the other factions. I've had Casse infantry charge the enemy when changing positions down the line and they tend to make gaps in the line when they try to encircle the enemy.

I'm reading De Re Militari by Vegetius, so hopefully once I get some Legionary Cohorts I'll be ready for the necessary tactical reforms.