This might be overly simplistic but I'll
throw it in anyway.
VR - Well understood to be made worse if an
unwary Pilot increases pitch (and therefore
angle of attack) and adds power (therefore increasing induced flow) by raising collective, misguidedly thinking this action will arrest ROD.
The problem is related to the volume and speed of induced flow as more recirculation is encouraged by more induced flow.
So, much more likely that VR would be encountered at large angles of attack and high volumes of induced flow.
The blades of the V22 seem to have a lot of pitch applied in design. Their relatively small disc area suggests a high induced flow. Are they close to the line already?
If close to critical, the discs (or just one of them) would not need much of;
(A) an updraft to further oppose induced flow, thereby increasing recirculation (doesn't matter if the upward relative airflow is due to ROD or updraft)
or
(B) a downdraft increasing induced flow and pushing down the wing at the same time, encouraging the pilot to lift that wing by pulling more pitch...increasing induced flow...
At least in a Heli we can fly forwards and out,(if we have the height) no 12 seconds to wait.
I hope a lot of work now gets done on investigating this, whatever the General says.
SPS