Kill shares of four significant tanks (based on all kills by tanks). AHIII was introduced at the end of September 2016. T34/85's share jumped up by one third from one tour to the next.
Already explained with the usage of smaller, faster GVs, as well as the retention of more experienced players w/ the introduction of AHIII.
One tank or plane being most used is normal, and a significant part of the set being 'hangar queens' is to be expected, too.
But when the most used tank is also one of the best/most successful ones and has a dominating position in the arena (massive share in kills), while much higher perked tanks are almost never used because they are arguably hardly worth it, there's a problem in my opinion.
How is "One Tank or Plane being most used is normal" not going to be the most successful and dominant tank? Again in the days of Old most players wouldn't use the T34/85 because of its "good as free" perk cost. Because Panzers were/ are Free. That attitude changed a long time ago just as your chart shows.
Higher Perked tanks are not used because of the cost to use them for a given situation, you use what is appropriate and affords you the most time for a sortie. You don't borrow Scott66's Semi truck to haul one box of Kleenex tissues from the store to the house when you can drive your car or ride a bike do ya?
Players don't chose between a capable but free tank or chose to risk some perks for superior performance.
Ummmmmm, yeah - they - we - I - do choose GVs based on capability, situations, mission, fun, and perk cost. I don't know any experienced player that doesnt choose GVs based on capability, and perk cost for a given situation. This goes back to Newb day - when you start out with Zero perks and don't have access to the more expensive equipment.
Now your proposal is to raise and lower perks based on a discussion brought up by a couple of players. Ok, but there is a consequence to New players, Less experienced players, and Players without perks in the bank by doing this. As an example - just like when starting out, they save one or two dozen perks using the Panzer or other free perked GV, and then get into a Spawn battle use a T34 and lose everything within 2-3 sorties. Then what?
They go back and HAVE to CHOOSE a "Free" tank, because they have no other choice if they wish to continue playing. There are several players in here that choose the Panzer for its "Free" value and no loss of perks when killed.
Although the T34 cost 2-3 perks and sometimes up to 4 perks - when getting killed more than you score kills - 2, 3, or 4 perks subtracted from the GV Savings account can drain it pretty quickly. As for the M3 and getting perks? You get 1 -1.5 perk per supp run during normal hours. Late at night when you are outnumbered 2, 3, or 4 to 1 yes you get 2.5-3.5 perks sometimes more. Which leads into another argument about the overuse of the M3 and raising the perks higher blah blah blah which I wont go into here.
A player can already diversify their GV usage and learn to use other tanks and learn different attacks using something like the M8, M3 and get anywhere from 8 - 48 perks in a single sortie. But most don't. There are plenty of opportunities for players to use whatever tank they want. However there is/ are and will be players that have to start out in the "Free" tanks and work their way up.