Thanks for the clarifications.
It seems to me that the X3 configuration is a low risk technological progression from the conventional tail rotor configuration.
It is not worse off in terms of loss of power for counter torque during hover. But it gains significant advantage from the direct horizontal thrust for forward flight.
The only issue is the risk to ground movement due to the propellers. This will likely necessitate doing away with the side doors and rely entirely on the rear ramp, like in Chinook.
This will also mean this configuration may only be suitable for a chopper beyond a certain size.
Do the above observations make sense?