Yes, because not allowing scottish and welsh MPs to vote is not on devolved matters is going to cause problems, especially for Labour, as they rarely achieve a majority in England, and rely on over-represented Scotland and Wales to ensure they have a working majority.
Likewise, in 2010, parliament would not have been hung for votes counting only English seats.
I'm still all in favour of full fiscal and legislative automony for Scotland and Wales, I think it would work out beneficial to all one way or another. Of course, I would expect the major partner to get the best deal in any asset split, and any national public sector work to be returned to the home area...