I think would be nice to agree on 'historic' force pools ( if every units is selectable when playng online battles , for example one player that decide to field a Swiss Army can choose between :
1-12 Swiss Halabeards units
0-12 Swiss pikemen Units
0-6 Heavy armoured Pikemen
0-4 Woodsmen
0-2 Arquebusers (if agreed as a + 1460 game )
0-2 Crossbowmens
0-1 Handgunners ( if agreed as a +1460 game)
0-1 Mounted crossbows

or if one choose to be a Viking Army between
1-16 Viking Units
0-5 Archers units
0-2 Spearmen units
0-1 Feudal Knights

like many games like WH and WH40000 ... would be more realistic and interesting instead to see peoples to field the 'perfect armies ' to win their boring battles .