I liked the standard bearers a lot, they were cool. They just added a little realism for me, but it's good they were only in some units. Made them stand out a little.

Since men/units are already unique in MTWII, I'm none too fussed if it's in there or not (just as implemented in RTW - not carrying the big flag, that wouldn't work; if he died you couldn't get your groups quick!), but it'd be nice I guess.