The frontline game mode clearly shows how the meta tanks have changed since the introduction of wheeled vehicles.
HT are resigned to playing from afar as no longer can they move up to head a push with simply armour (for whatever that is worth these days).
Trying to play a HT on HK frontlines? Forget it.
The FL mode is now the domain of wheeled vehicles, borasque or LT's with a few competitive meds (Progetoo).
With a HT the only real contender is the E75TS with its enhanced mobility akin to a MED.
In a HT between the wheelies buzzing around the constant spotting and if your tracked if the SPG don't get you then the airstrikes and artillery sure will.
Thinking of playing a HT on HK FL forget it.