Surely Skoda should not be concerned about when a vehicle is registered, rather not having any on the road before yet another launch. They have already shot themselves in the foot with the latter by having so many available for journalists - probably the same journalists who already saw the Car in LHD format on earlier launches.
A reasonable compromise would be to allow all vehicles to be registered as soon as sufficient vehicle specific data is available, but not hand them over till the 6th or whenever. That would ensure owners are not unnecessarily penalised by Skoda for having to wait post April fools day to suit Skoda's own requirement.