What continued Halifax-class production might have changed

How might the Halifax class have evolved if Canada kept building it and won exports?

An evolved second or third batch might gain size and missile capability, while export sales would bring an economic advantage and lower costs.

Continued production would probably lead to an evolved Halifax design. A second or third batch is imagined, with some growth in size and changes to missile capability. Foreign purchases are described as an economic advantage that would reduce costs. No new armament or hull size is specified.