yup, the troops ALL focus on the closer opponents, regardless of the number. 1500 archers will ignore the 5000 advancing warriors to all shoot the 1 guy on horseback, then in unison they turn their attention to the dude with a sword.

oh well, enjoy it while it lasts... and if they don't change it, then those that know will be on an equal footing / those that don't will learn over time.