The fact that you remove the franchisee's opportunity to finally get in a good standing of profit making by forcing a new look that customers' reviews says is not good.

The look/concept.

The forced new look and the debt that comes with it.

Consult with franchise owners who are in the day to day when creating a new design & set up. Also, give owners more that 2 years after they've paid their notes to get a better cushion to operate from. Especially since costs of goods/min. wage are increasing at greater rate than profits.