The t34 also heavily underperforms compared to the panzer iv. Price structure and role are absolutely similar though. And that doesn't even have the excuse of being doctrinal. If doctrinal units are not allowed to outperform the panzer 4 than the panzer 4 should not that radically dominate the t34. Since the same argument applies.
The panzer 4 usually survives a direct engagement against a t34 with about 20 %. Taken into account that it costs 25 % more fuel I think the balance with these units is fine. The t34 has still the better ai capabilities.
Nobody is asking to nerf the stats of the Easy8 . Players just have the feeling that it's to cheap when being compared with its german counterparts. Either a price increase or a tech binding to the major would solve that problem.