I need to speak up for Battlefield 2 commanders, a real commander on the field was incredibly useful, wherever sat with snipers on the hill calling shots or in the back of an apc it was a full time job, but people can hunt you too.
You can't hide from the commander, and he can rain fire down. It kept the field of battle honest. That's without acknowledging what happens when squad leaders listen to him, having a squad of assigned transporters who use vehicles mindful and patiently who deliver whole squads to strategically useful locations, squads that defend.
It's part of why bf3 will never match up.