I also share the popular opinion of RTW's shortcomings. If you want to spice up your SP game, some members here have already gave some suggestions that worked for me (somewhat).
Try playing with HUGE armies.
When you have enough surplus cash, give obscene amounts to different factions and watch them emulate Alexander in province grabbing.
Try downloading the Total Realism Mod: new units, slower kill rates, longer building times. It gives a different feel to the game.
Or wait for half a year for the mods to be downloadable.
And yes, the Chivalric Men-at-Arms can carve a path through any Hastati/Princepes battle line.
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