VMX-22 does the OT&E stuff that HMX does with Phrogs. No real need to duplicate efforts.
Exactly. As backdrop, prior to 2003 and creation of VMX-22, HMX-1 provided an OTD (Operational Test Director) and pilots for MV-22 Operational Testing. In a way, VMX-22 sprung from the forehead of HMX-1 in order to have a dedicated Tilt-Rotor OT unit when the Osprey returned to flight after the hiatus in all flight testing after initial mishaps.