I had a commander I hadn't see before a few days ago with a 3-line, triple sound macro, that basically said "the enemy is near, avoid the attack, regroup." After about the sixth blast of this, someone replied meekly "where to?" Probably because the (admittedly weak) team had been regrouping into little clumps in all possible directions and the commander apparently hadn't noticed and adapted their commands accordingly.
I think commanders tend to be too rigid in general. A sort of stubbornness that stems from them knowing the "correct" way to play, along with the fact their commands are issued purely by macro. I get the second bit - you don't have much time to type - but being reactive to the obvious weaknesses of your team strikes me as a necessary skill.
That said, there is a little subset of commanders who apparently have a huge amount of time to type, and will call me out by name, reminding me, for example, that every time I die it costs the team points. Really enjoying the targeted harassment, guys. Do keep it up!