Another issue is that with a 20x20 craft will occupy 1/4 of the available map area in a 40x40 battlescape and it will be easier to determine the UFO's location or land right new to it. Some modded terrains might have issues if they were designed for 20x10 or 20x10 craft. This is something that the modder can solve through map generation rules or terrain redesign though.
Actually, this would make a great *starting* transport for XCOM.V-22 is 1988~ era technology; and it cruises at 550 km/h; compared to the Skyranger's 760 km/h.
I wanted an V-22 to replace the Skyranger as the starting craft for the Terminator total conversion that I've been putting together. This is just what I needed
many people dreamt about a X-Com helicopter, and Osprey is just as good.
Hangar file updated with the V22 / 4 planes / xarmy ( urban and combat veicules)enjoy