Assault will get it's CP changed. Not sure if it was Sander but someone from the balance team already said that on coh2.org 2-3 weeks ago.
Valentine could get changed to 6 CP, I don't think it's performance is too good but the timing in 1v1 is a problem for sure. Alternatively, it could be tied to T3 without CP requirement.
Performance is not fine it has a gun that is superior to that of C.Pz, its profile remained the same although it got a buff at damage. It's vet bonuses and XP value also need to be looked.
Actually I would rather make it more realistic and replace the "light tank" design with a better armored designed but less DPS.
Pop and price could go down
The synergy with Sexton could become a removed and move either to officer or to artillery officer or be a vehicle upgrade.
The rest is fine IMO.
Sexton can simply fire too much volume especial with valentine also rather difficult to counter for price.
The officer comes to late is to powerful, light gammon bomb should be replaced by incendiary gammon bomb and does not need recon plane
FOP comes way to late and it situational, should come earlier and be less powerful
Resupply operation is way to cost effective. It should lose ATG and bonus and have price adjusted. (medic box should be allow to be loaded to transports)