I have an idea for recon:
What if they give the recon class a infrared laser designator for spotting purposes. Only other recons and vehicle operators can see the infrared laser and it can be used for targeting purposes. Say you're doing some recon and you see a tank or a building populated with multiple hostiles. Pull out your infrared laser and mark them. That way jets, tanks, and helicopters not in your squad can see that they're there. This can be balanced so people don't run around with lasers because enemy recons can also see the lasers.
With the addition of jets, this can be an interesting team play factor. It can also boost the amount of recon the recons do, because we all know that class isn't used to it's full potential.