The true question is: what extent of "realism" we are willing to accept? Simulating a tank is never a problem. Simulating how it was historically accurately used in WW2 is a different story.
Tank warfare requires a huge level of teamwork and discipline. Tanks must co-operate closely with infantry, artillery and aircrafts in order to success. Even in tank units alone, tanks do not maneuver as they see fit, they maneuver in formation, under strict command. Do you know why German panzers were so successful in the Battle of France, despite the fact that one-on-one, French and British tanks were not inferior? Because they had radio
Wartime tactics rarely work online, due to the lack of discipline. I know gaming is for fun, but if you want to simulate history, you have to accept the not-so-nice things of it as well. Even in IL-2 squads, people help you more in learning how to fly than actually co-operate with you. Teamwork between 6 people is an exceptional feat. It is no problem for flying sims, since pilots have incredible level of freedom IRL as well. Now imagine a tank battle maneuver of say, 20 people, which is the size of a medium battle in WWII. They can stay in formation, but at the first sight of enemy, this formation will fall apart: someone will try to accelerate and outflank, someone will resort to shoot and scoot, others will conveniently retreat, since "living to fight the other day" is most important to them.
Another thing that undermine the fun-factor is death. We airboys happily accept the rule that die is die, and you must restart the mission from the beginning. But that is only because if you fly carefully, you will live very long. Tank battle is different story: no skill can save you from an AP round firing from a hiding AT-gun. In no time people will complain about sudden death.
In conclusion, a tank sim, however truthfully modelled, will never be able to fully depic the fact of war.