Better? mate the flaktrack is not able to perform these things at all. Which is a problem because flanking chasing and killing lv's are a very important reason why i buy a lv. For the record, i agree that a vet 2 FT is very good at area denial. However the OKW does not need much in area denial as their AT guns can retreat and the occasional leigh has sufficient range to be parked next to flak truck HQ. so its value is rather dubious
You're confusing anti-tank LVs and anti-infantry LVs somehow. Only the Stuart does both competently, but the common complaint is that it isn't great at either.
Flak HT forces almost non-stop retreats and inflicts serious health damage and bleed, which OKW absolutely needs. An mg34 is absolutely no replacement for the mobility and damage output the Flak HT offers, and more importantly the mg34 is highly vulnerable to nades and mortar shells.
In any case it's bizarre that you don't understand the importance of area denial in a game in which 2/3 of your economy is largely based on your territories held, and the win condition is literally tied to holding three areas denoted by stars.