Well, I've got my Tank hunters one up. And in order to give another example of what I'm talking about with focusing the doctrains, at least I hope thats what it sounds like I'm saying, here is a modified version of the infantry doctrain.
Tear OneDefensive OperationsRiflemen can build Wire Sandbags and Tank Traps
Onmap HowitzerUnlocks Howitzer
Smoke GrenadeSmoke Grenades available for Riflemen
Bravery15% suppression resistance for Rifles and Rangers
Offensive OperationsInfantry Platoons arrive 30 seconds Earlier
Tier 2American CommandAmerican Officer avalable.
Heavy WeaponsRifle Squads can purchase a single Bazooka
Support BarrageOffmap howitzer barrage available
Short Fuse Sticky BombSticky bombs have half the delay do more damage.
Concussion GranadesConcussion grenades available to Rangers and Rifles
Tier ThreeLocked and LoadedHMG, Morter and Sniper gain increased range and sight.
Tank ReapersBazooka and ATG gain penetration and damage.
Expert EngineersEngineers can build roadblocks, MG nests and Triage centers cost manpower not munitions. (Something having to do with the allied fortifications)
Bi-podsRiflemen gain increased accuracy when not moving, more when in cover.
Supply EfficiencyRanger availability +2, upgrades cost less.
Tier FourImproved HowitzerHowitzer gains
More accuracy/Less spread
Camouflage when not firing?
Fires 3 extra rounds.
Hunkered DownAll support weapons recieve:
Bonuses to Defense when in cover or buildings.
Less received accuracy
Unpack faster
Artillery HQMore Offmaps, per whatever they had planned.
Allied GritAll Allied infantry gain health bonus, less received accuracy.
1st Ranger BattalionRangers may purchase Parachutes to airdrop like airborne.
Rangers gain Infantry Awareness
Start at Vet one/gain accuracy bonus.
I changed a couple things from what the launcher had, I'm sure some things are differant on their lists anyway. I'm less familliar with the US infantry, but I think this is a little better than what they had.