I don't see the problem, you say in one of your other posts you don't think the Ukraine tie will be played, this would cover that off.
Another solution would be to give Ukraine an automatically qualified position in the world cup and either make a group of 5 or they could have a play off against a randomly drawn 2nd placed placed team following the first qualifying rounds. Then no fixture disruption, Ukraine can concentrate on more important things until November, who would argue against it, only one extra match to fit into the world cup schedule and it would really pish aff Russia.