The German KV-1B and Soviet KV-1E are far too heavily armoured to stay at 4.0 in RB. They should easily be increased in BR in both AB and RB, possibly as far up as the KV-1 ZiS-5 at 4.7 since they trade a worse gun for even more armour than it.
The EBR 1951 is not better than the AMX-13 FL-11 and should be decreased to the same 4.3 BR. Similarly, the M24 is also as good, and should be increased to 4.3 (AB/RB/SB). They all bring the firepower of the Sherman onto a quick chassis, trading differing amounts of usable armour, speed and gun handling compared to eachother.
I would also prefer to see the Lago 1 lose the APDS shell (as it was canceled before development of the APDS started) and be dropped to around 2.0 to make it perform essentially as a lower BR version of the Strv m/42.
Similarly, both the Strv m/38 and Strv m/39 could lose the APDS shell as it makes them lasers compared to other nations 1.0 vehicles. They would still perform well without it. Also for historical reasons. (The m/40L however should keep it)
The Pvkv III is straight up awful and can easily be dropped back to 2.7 where it still wasn’t amazing, but at least usable.
The M26 Pershing is not that significantly better than the Tiger E, and should at most be 0.3 BR above it. Especially as long as it shares that spot with its significantly better brothers (T26E5/T26E1-1). Unless many vehicles at 7.3 gets moved up.
The CCVL and XM8 should for all intents and purposes “switch places” as the XM8 was the successor to the CCVL. As such it makes more sense for it to receive better ammo etc. But I understand it’s a hard case to argue from a gameplay perspective, as it’s much work (which might upset people) for little reward.
The M14/41 and M15/42 are not competetive at their BR’s as they neither have the penetration, armour or speed to do much, especially when they are forced into an uptier.
Due to the flat armour of the ISU-152, it isn’t that significantly better than the SU-152, and could be dropped to 4.3.
The T-35 can easily oppress any enemy team due to its high survivability and quick firing 45mm, and should be increased in BR so the chance of seeing it in lower games is rarer.
The BMP-1 in AB could easily be raised to 8.0 as it is in both RB and SB.