Im what ways would multiplayer change if you could train multiple units together at a time if you had pop and resources?

So basically if you have the res and pop to train 10 paladins, normally a stable would train them one by one after you queue them or spread production in multiple stables. Suppose you could just train 10 and they take the time of training 1 paladin. 1 stable can produce maximum 20 at once. I think this would make multiplayer more fast paced and the map a little cleaner as you'd need lesser production buildings. What do you guys think?