Just one more thing would be fine by me.
I think LT is kind of a beefed up Rifle squad that adds early game pressure. Really though I just think his abilities should be more flavorful. (Maybe some kind of recon with binoculars, or calling in a mortar strike, or drawing enemy fire or something.
Kinda wondered if some sort of sprint ability would be fitting for the LT to counteract the enemy's position, with his tier generally having a more mobile feel over the Captain.
In full - in my fevered dreams, he'd have "Flanking Maneuver", usable on himself or another infantry squad to improve their speed for a short time at the cost of increasing their received accuracy a lot while they're moving, preventing the squad from running around an open field to facehug their intended target but allowing squads to flank around. I really do mean "short time" to prevent the ability from working too good at chasing down retreating squads constantly.