Main thing here is the T34/76's hull mgs. Cost and doctrinal ram synergy shouldn't be taken into consideration when determining pop value.
There's enough benefits for the Cromwell to justify it having a higher pop than a T34/76, even if its AI is worse cause of its shitty mgs:
20% more penetration on average
-4.7% reload time
35.7% faster horizontal tracking
6.7% more armor
7.7% more speed
12.5% faster rotation
13% more acceleration
10% more main gun accuracy with tank commander
28.6% more sight with tank commander
Smoke shell
Hunt ability next patch
Warspeed with Hammer
And while it has worse 80 damage radius, coh2db gives it an AoE score of 6.7 compared to 5.59 for T34, probably caused by the much better far AoE damage. Run simulations with this https://www.coh2.org/topic/105279/scatter-this-your-trusty-scatter-calculator if you want to find out how big a performance difference that leads to for main gun against infantry.
As we both know, far accuracy and pen are worth MUCH MUCH more than anything else. Which is where Chrommy is bad. And REALLY hurts its fighting ability agaisnt Panthers and Tigers. It kinda... just... bounces about 70% of the time. The REALLY BAD rear armor of Axis heavies is the only blessing. Good luck with that against anyone not suicidal, Panthers have 55 range and pretty good accuracy (when not moving).
Chrommy also gets marginal AT buffs vs other tanks with veterance, instead getting... smoke recharge rate and some reload rate, and that iconic speed which doesnt let it upfight or take a hit. Lets it scram after eating a Panther round. Also its 2000 more exp than a T-34, with effectively the same veterency. its uncanny, like Relic just copied them.
Otherwise, yea. Its a lot better than the T-34 vs tanks, though not a high standard. She could do with some reduced received accuracy or something in the Vet tree.