The tank transporters can be useful for scenario design, such as one I'm working on for Kuwait 1990 where a Kuwaiti Brigade ambushed an Iraqi Division which had their armour still loaded on transporters.
If anything the game might be further improved with the addition of functioning bridgelayers, as the British Chieftain AVLB(according to the British Army official website) can lay a No. 8 Bridge 24.4m long in about 5 minutes. The bridge can then be recovered from the far side of the gap and carried along behind the battlegroup being supported (no estimates on how long but I'd assume a considerably longer period of time).
I would consider this to be in the scope of the game, but it's just my opinion and know this is an old chestnut and won't be happening anytime soon.
