That is classic Army aviation doctrine. Nothing at all wrong with that, provided you recognize it for what it is. You are using aviation as a supporting maneuver element rather than a part of combined arms. The AH-64 is a phenomenal fires platform. It works for you, so rock on.
But it ain't CAS.
Like I said Ive done both. Type controlled 9-lines and just CCA 5 lines. Time and place for both, doesnt mean one is tactically inferior. As far as the Customer is concerned its all about munitions effects and time on target. The thing I love is the automatic 2nd Class citizen status we receive in the eyes of the Fixed wing Fires world by everybody else. Is the conventional Army new to this game? Yeah absolutely. But in the grand scheme of things the guys making the news for CIVCAS and Fratricide incidents, are typically the "Premier CAS aircraft" flying the A-10. Hear it all the time about how the Fixed wing guys want the JTAC to push the Helos out so they can "get in there and get it done"... Then I watch an AC-130 drop a hundred 40mm rounds on a guy in an open field and miss. Or watch Vipers drop a JDAM either into the wrong field or level the wrong building. Not saying we always drop the Warhead on the Forehead... but when your record is something like 90% of the KIA/WIAs from Aerial Fires... Kinda lends some voice to the argument that we need to be part of the game. Now its just convincing the other players to let us in and convincing our Ground centric leadership that its important enough to spend money on.