It is true the restore could be very messy, but I have to admit it logically looks like your best course of action.Therefore you should backup the current system state if the restored one doesn't work at least you go back to where you are now.Let say this is almost starting from scratch if you proceed with restore. But this time you should make sure that you follow the EBS preparation wizard and NOT SKIPPING ANY ERRORS. that is usually where the problem is.
The EBS Preparation wizard is your first step to a succesful migration.
The following link is a good Step-by-Step Migration.
http://www.microsoft.com/downloadS/details.aspx?familyid=191B141E-3A1F-4C1B-BD2D-15623751E518&displaylang=enGood luck!