It could be a problem for sure….but having three tanks meant one of them was assigned troop leader so he activated on a four as a senior leader….the others on threes. Further more, using the radio net, he could command another tank to move or fire using one of his command initiatives.
The alternative would have been big CoC but that would have been very unbalanced.
Like all games designed to give both players an equal chance at winning, the games are typically more balanced than reality would have been. The allies were able to overwhelm the Germans with weight of numbers.
I suspect that in order to represent this, especially when using armour in this fashion, I would be inclined to add a pair of different coloured dice to the allied roll each phase. Any natural threes (or a 1&2 combined) being immediate assigned to a tank, ignoring all other
Results including fives and sixes.
That, or simply allow tanks to activate on a two…..but they only get to either move or fire?