Exactly - there were no new Apaches being bought, they just got rid of the Kiowa Warriors instead of keeping some and getting rid of some Apaches, which was the other choice.
The writing was on the wall - there was going to be a reduction in the number of Army helicopters, both combat and utility - it was up to the Army to decide how to keep as much capability as possible in the process.
The decision was made to keep the most-capable helos possible - and to eliminate whole types to reduce the maintenance/supply/training burden in the process.
While AH-64s will be over-spec'ed in the recon helo role, OH-58Ds would be underspec'ed (and therefore less-efffective and more vulnerable) in most CAS missions, where the AH-64s would be perfect.