His turret mode should maybe get some more armor from the front, but have no heal access, and change the heal in recon mode to be on a cool down similar to Soldiers, and be usable while moving and shooting. I would also increase the length of time it takes to switch modes.
It would make him slightly harder to kill from the front in turret mode, but easier to kill with chip damage if he's unsupported. In recon mode, he would be able to stay mobile and contribute more actively.
Ideally, he'd shoot about as well as Soldier in recon mode, with similar healing that is more mobile, but less team friendly. He'd have less burst due to no helix rocket, and less speed with no sprint. I can't remember how their health totals compare right now, but he'd still have a larger character model, and thus be easier to kill overall than a Soldier.