In my opinion the real world example that would best work within Dust would be the fact that out in the open, yes, RL tanks are pretty godly, but in close confines such as a city, and when facing an entrenched and well prepared enemy, they are a liability waiting to pop (generally speaking).

Ideally (well, for me anyway), Dust will one day increase player counts and, obviously, introduce all the different vehicles, then tailor the game to the point that being being caught out in the open between 2 sockets would be all but a death sentence for a lone foot soldier. Pushes from socket to socket would require support from armor, and with enough vehicles, as well as with the importance this would place on vehicles, I think a majority of the skirmishes would become vehicle vs vehicle, with the opposing infantry escorts engaging each other as opposed to the vehicles.

You would still have infantry based AV, but I feel there would be much less, mainly due to the fact that anything outside CQC areas would be the realm of vehicles. In RL the best AV is a tank, and tanks are made to fight tanks, not infantry, just like infantry is generally made to fight infantry. The middle ground would be an IFV or APC. Making vehicles the best way to counter vehicles I think opens the door for less AV, as well as the ability to specialize AV more.

Basically this forces teamwork. Infantry needs vehicle support away from sockets, vehicles need infantry support in sockets. A serious push on a skilled enemy entrenched well into a socket would require an armor column approaching the socket, with infantry dismounting upon arriving at the socket to clear out opposing infantry will vehicles engage opposing vehicles.

Just a thought.