It is odd if an archetype trades out something as useful as a bonus feat, but it can be done well. Mostly, if you gain a feat or feature you wouldn't be able to take normally.

Unarmed Fighter and Lore Warden do this, in that they grant certain feats regardless of what stats or other feats the Fighter has (Combat Expertise from Lore Warden; Style Feat from Unarmed Fighter).

You can also give him extra feats, but have them be specific like with the Unbreakable archetype.

So far, X, your plan seems better suited for a Ranger and trading up his Style Feats for early entry into the maneuver training feats.

Though I do like not trading out the Armor and Weapon mastery stuff. Maybe have him gain certain maneuvers without them directly being from the martial training feats