Two major suggestions:
Make minefields work. Having hundreds of enemy infantry skirt mine fields as effortlessly as traveling along a wide-open road on a bright summers day is quite retarded. other than making the enemy shift their movement over a TINY bit, these are completely useless. Havn't tested with tanks, but I'm going to go ahead and guess it doesnt work on them either.
Give us recordable demo abilities. When my match is done, I would love to have a button that says "record as demo", so I can save the match to a file, send it to my friends, post it on a forum, and have other people download it and watch it. Preferably get rid of the 60 second pause for commands period in the recording, so you can view it straight through with no interruptions. Also, a scroll bar to facilitate fast forwarding/rewinding would be excellent.