The M10 has 0.06 accuracy up close, giving it the highest accuracy ingame, shared by other tank destroyers/hunters such as the Jackson, Panther, Jagdpanzer, and Jagdtiger, and higher than other TDs such as the Elefant and SU85. Accuracy at range is 0.03, higher than all regular tanks and only lower than the OKW Panther, Jackson, Jagdpanzer, equal to the OH Panther, and still higher than the Elefant and SU85. Using HVAP rounds gives it 0.04 accuracy, which is (again) the highest accuracy at range ingame, shared with the Jackson w/HVAP, Jagdpanzer, and Jagdtiger.
What's more, it has a 0.75 accuracy modifier on the move, unique to USF tanks, compared to all other faction's 0.5 modifier. Again, another advantage.
Conclusion- You're incorrect.
Check the Panthers moving accuracy. The OKW Panther has a better chance to hit a Jackson on the move at long range then the Jackson has to hit it due to it having a high base accuracy and .65 moving accuracy and the Jacksons unusually large target size.
I think the M10 is good in fact great for what it costs. I say increase by maybe 5 fuel not because it will make a huge difference (kind of like the larger size of Shermans then other Mediums) but because I think it should reflect its slightly better value now for balance purposes. Thats all. Not to delay it not to prevent it from spamming. But simply to balance its cost vs performance.
Losing 85 Fuel to chase down and finish off a Panther or Tiger is a fair trade. I mean you can use these as Suicide Heavy tank killers which I have. That and crush anyone whom dares to try and faust you.
I am not saying its OP. Its not OP. But Its also only 15 more fuel then a Stuart. And alot cheaper if you include the Stuarts tech cost.
M10 DPS 27-16 (54-32 for 170 fuel no teching)
M36 DPS 27-19 (205 fuel for the first with Teching)
So there is no longer a great variance there.