Classical tankhunters don’t really exist.
Let me clarify.
Usually when I had to pick a vehicle in the past, my thought process has been:
“Do I want a all-rounder tank for this campain?”
Example Panzer IV J
“Or do I want a vehicle that is better at infantry support?”
Example Panzer III N
“Or do I want a vehicle that is lacking in offensive power and gets better armor and survivability in return”?
Example Stug III G
Now one option is usually missing in this list, and that is a vehicle which
“Sacrifices its survivability in return of more firepower”
I am talking about glass canon tankhunters, which with some exceptions and premium tanks don’t exist in the game.
With the introduction of Battle ratings, what you’ll really need for more variety are tanks like the Marder, Jackson, SU 76, Nashorn, Achilles 17 pounder etc etc.
Let me explain why I think these vehicles are needed.
If I wanted to create a balanced Battle rating level, I would follow the same criteria like my examples above,
I would look for a jack of all trades vehicle that fits into a certain time period, than I would look for 3 other vehicles that are comparable but more specialised in a certain role.
Jumbos are better armored but lack fire power, KV1 are better armored but lack firepower (well at least in theory) Panzer III M are better armored but lack firepower.
T28 are great against infantry with its HE, but lack a bit in anti tank power, Panzer IV N are great against infantry but lack in anti tank power.
Jagdpanzer IV are increadibly well protected and have great guns - but lack a lot in anti infantry power.
You see a good BR should have multiple vehicles on the same level but each fill in an own tactical role.
What we need are more vehicles like the Hellcat - paper thin armor, poor anti infantry power, being open top - but having a great gun.
These vehicles should hit into the category:
"My BR is 3, but in the case of me getting upmatched with BR4 then I bring a vehicle that trades many of its abilities for still being able to fight other vehicles at higher Battle Ratings.