Jcooper,
The VRS issue for tilt rotors is complex, but the answer is simple.
In a helicopter, VRS leads to an unacceptable rate of descent which can most of the time be powered up through, and in the worst case leads to a hard landing. Yes, most helicopters can be flown up by raising the collective and climbing up out of VRS. The older helicopters back on day one had too little power margin, and so could not do this, but most turbine helos can.
With a tilt rotor, the issue is not that the descent that builds up, it is that the rotors enter VRS at different times, so that the aircraft departs controlled flight, so that powered recovery is impossible after VRS experienced, since the aircraft is upside down by then. Upside down on approach is a real problem.