I shot this just to show how cumbersome a 16th century infantry formation was, compared to a 17th century infantry formation.
This is what amounts to a tercio or any other large infantry column formation, composed mainly of close combat troops:
Very wasteful of manpower, IMO, compared to how a 17th century battalion (composed of either a single regiment, several battered regiments or as a part of a single larger regiment) was usually deployed:
The latter is how troops should be deployed in the campaign, too, if you are interested in at least some historical accuracy. Luckily, one of the preset deployments already does this, if you have roughly 2 shot to 1 pike.