I'll get against what most here said, and claim that this is a poor set, no variety in helms, neither in weapons, but only in clothing, at last, no shield.
Without shield, I would have seen better an axe as weapon, one soldier with bullet helm, one with a shield, and one with a spear, and, why not, with a shield too, that would have been a great combination.
Course, today, we have lots of weapons to give them and put them into our lego world, but think about these days' sets, could someone have every set from this era, he won't have much extra weapons to pump up their equipment.
The good point for those days was probably the possibility to get in the castle scheme, or to add some soldiers to an existing "world". I think it is nice that every set has nearly its own coats of arms, you can make whatever alliance you want to build your opposing armies.
For today, light grey ABS swords and helmets are pretty scarce, so this makes these soldiers interresting, also, their torsos are rare, as they were sold in only a few sets, not as the lions or crossed axes ones.
So, if it has to be transposed into the current (or forthcoming) era, it won't be much interresting, neither as an army builder (compared to battlepack's variety), nor as an impulse (not enough accessories). But if only it would be given with, say, an happy meal at McD's, I will sure eat at least one hamburger.