one could still add a nack with a romulan head, perhaps a simpler version of the firehawk, and it could server as the romulans first attempt to duplicate a warp capable vessel based on the D7's the got from the klingons, using the above ship as the rear section. It would be logical to assume that after the trade of the D7 the romulans would have disected one and tried to "build their own" and they probably wouldn't radicly depart from the design right off the bat.