Yes, the battle of Kirsk was mostly about infantry, so this giant tank vs tank engagement is silly.
I think there is a fundamental problem that if both sides have tanks, the respective tankers want to feel safe and kill the other tank before doing what tanks were made for (infantry support.)
I think the only case where you don't see this is Konigplatz on the Russians (if they are good) they will load up their guns with HE and try and not worry to much about the Tiger, giving infantry support and clearing positions. If a Tiger comes, they should quickly judge if they need to engage it, retreat and go back to inf support, or ignore it. Often, because of the nature of the combat, neitehr side will be able to get any damaging shots, so they can ignore it, or one side or the other will quickly demonstrate an advantage, so the tanker (if they have the advantage) can engage, or if they don't they can retreat. This actually applies to both sides.
This actually applies in all situations, but most people will only go with the engaging option, which leaves you as a sitting duck. I don't know how giving tankers BT7s or T60s will fundamentally change this. Sure, now they can often do nothing against other tanks, but they still usually stay in place and try.
Tankers are just overall to concerned about their own safety, and overly used to the concept of tanks being destroyed by tanks, to realize in combined arms it is about the infantry, and if you realize your just a toy to make things go smoothly, thats exactly what will happen. Hell, when I'm engaging tanks, while reloading (especially with the IS2) I'm scanning for infantry and mowing them down with the Coax.
Would the T34-57 fundamentally change things..no. I don't think any one tank (besides maybe the King Tiger in late war, or the KV2 in early war, will fundamentally change anything.) However, I feel like the only way to get maps to where we want them, is to have a whole wide selection of tanks, including minor variants, and then go from there.
Edit: And yeah, light tank vs light tank engagements would be kickass (BT7, T26, PZ2/3, etc..and yes I know some of these are classified as medium tanks, imo they are lightish.)
I think everybody wants to see BIG TANK vs BIG TANK with flanks supported by BIG TANKS!!! People forget that World War II tank warfare was all about mobility, and thus MBL Tanks and Light tanks were as important, if not more important, then the breakthrough heavy tanks.