Do steeds summoned with Find Greater Steed have other options than the usual control rules during mounted combat?

During mounted combat, I understand there are two possible options:

  1. You can control your mount, in which case your mount cannot make an attack, or
  2. You can opt to leave it independent (and controlled by the DM) in which case it can attack, but may do things you don’t expect.

The text of find greater steed contains this excerpt:

Your steed serves you as a mount, both in combat and out, and you have an instinctive bond with it that allows you to fight as a seamless unit.

Does this phrase imply that there is some special way to control the steed beyond the above two normal options for mounts? Are steeds summoned in this way special in regards to the control rules, or is that just flavor text? It seems to me that an independent mount which can take actions that I cannot predict is not fighting as a seamless unit with me. Am I misunderstanding something?

The question here certainly provides an answer, but it’s not satisfying since it assumes that the mount has to use one of the two above options and does not consider that there may be alternatives.