This came up in the shoutbox, and should probably be addressed.
The 1.3 patch came with a clever change for medium tanks: reduced target size, making them all a bit more survivable. Specialist vehicles like the Firefly and the Sherman Bulldozer did not receive this buff: they've got extra range/health/armour already.
But this is also a buff to an upgrade that should never have existed in the first place: the Bulldozer Attachment for the basic Sherman.
For those who don't know, you spend a little fuel and lose a little mobility. In return, the basic 76mm Sherman gets premium medium's armour and can take an extra 160 damage AT hit, which lets it handily beat enemy mediums.
The existence of this thing undermines every other premium medium in the USF lineup. It's got all the durability and utility of the 106 Sherman Bulldozer, but keeps its AT capability. It beats Panzer IVs as handily as a 76mm or Easy Eight, but unlike those two gets to keep its HE rounds. If you go Urban Assault, it gets the Comet's White Phosphorus too.
This is like looking at OKW Mechanized and deciding it needs a 70 FU vehicle with the Luchs' AI, the Puma's AT, and the ability to frontally wipe ATGs. It's an awful design.
At a bare minimum, teching the dozer upgrade should revert the Sherman's target size to 23. There's no justification for this thing having a better target size than the 105 when it gets to steal its armour and health.
Better still, remove this thing from the game entirely. Mechanized really doesn't need it, and Urban Assault can have the thematically appropriate and sadly overused Sherman 105.
All of these points are so laughably bad and easily deconstructed I don't even know where to begin.
Lets start with using correct terminology first. You're referring to the non-docrinal M4A3 75mm Sherman getting the doctrinal dozer blade upgrade found on the also doctribal 105mm Sherman. The doctrinal 76mm Sherman doesn't get this upgrade. There is no 106mm Sherman.
The upgrade probably brings it on par with a standard Wehrmacht Panzer IV, with the Pamzer IV having a better gun while the dozer Sherman has better armor and health. The cost of the Dozer Sherman exceeds that of the OST P4. The vehicle is still greatly inferior to the OKW P4J as well as a Vet 2 OST P4. It is simply no match for a Panther which goes without saying, and neither is any USF vehicle besides the Pershing and even that is 50/50.
The AP/HE shell mechanic is inferior to the P4's main gun being effective against all targets without the need to waste time switching ammo. This is especially true for the P4J.
The Dozer Sherman, like any Sherman, is easily countered by properly placed AT guns or Stugs, and also any double Shreck sqauds out there.
It's rather amusing to see people have trouble against this little tank with it's little dozer blade.