Most ancients rules allow far too much control over units; in real battles the commander seems to have had only limited agency once the battle started. The commanders who did manage to shift units around during battles are the exceptional ones like Alexander, Scipio, Hannibal and Caesar.
Rules like Tactica reflect that, but then they are not very interesting for players. I quite like the balance struck by some rules such as DBMM or To the Strongest; you can do a few things, but if you try anything too complicated, you will come to grief