Small Architecture firm has existing contract for building well under construction - including contract for interior design which includes all decorative built-in building elements (paint, carpet, tile, lights, bulkheads, casework). Owner is not happy with decisions made two years ago and changed mind on interior design.

Owner hires rival architecture firm to provide furniture & equipment (FFE) design. Owner requests rival firm to revise all of the common space finishes - the paint, carpet, tile, lights, bulkheads, casework that is under the original architect's contract. Rival firm provides new design and Owner requires original architect to change the design to match the rival's design.

Original architect has never been asked or offered to revise the design due to Owner's change of mind.

To me, this is like going to a steakhouse, getting dinner, and at dessert time, saying that you are going to go back in the kitchen and make dessert, and serve it in front of everyone because it's better than the steakhouse - without seeing the dessert menu.

Thanks in advance for any input!

Edit: I think my solution is going to be as fair as possible - my drawings, my standards, my rules. I'll treat their design just like any other employee's and give it a fair critique. They can alter their design to meet our standards, or leave it. I don't think I lose business that way, because how can you fault me for that?