I'll give HTC kudos for modeling the differences between the tanks. Prior to April/May 2011 (when the Panther was introduced), all of the tanks had the same aiming reticule and all of them had the same turn mechanism. Having the ability to pivot in place is a huge advantage most players don't use, and the knowing how to use the German mili-radian site can help with first or second shot hits. Ultimately, HTC has done a fine job at modeling most things on the tanks especially the armor and angle of impact mechanics.
My only issues are the ease in which follow up shots are made (lack of recoil effects), and the rate of fire for many tanks is too slow.
It would be nice to see HTC model OUT the continued forward movement when using only the A/D keys.