Are there any legal issues which may arise upon a successful traversal of the Examiner's restriction requirement of a design application?

Possibly.  If multiple designs are held to be patentably indistinct and can be covered by a single claim, any rejection of one  design over prior art will apply equally to all designs. See Ex parte Appeal No. 315-40, 152 USPQ 71 (Bd. App. 1965).