May I assume your operator or regulator does not permit:
1) The cancellation of IFR services and reversion to VFR, thus removing the need for the alternate airport, or
2) Conducting the remainder of the flight under a No Alternate IFR clause.
The regulator I work under and the operator I work for permit both options given the weather you described. Given an ATC error, I would hope even in the busier centres, they'd see the rationale of accepting a VFR Transport Category aircraft to return for landing at a primarily IFR operated airfield.