I think what the city needs to do - and I’ve said this before - when any demolition permit is issued (noting that they’re not supposed to be issued until after a development permit has been issued although Council waived that in this case

), the owner would be required to execute an Development Agreement that says that if a building permit hasn’t been issued and development hasn’t commenced within 12 months that there would be an annual penalty equal to the difference between what the property is taxed at vacant vs what it was taxed at prior to demolition. As this would be charged under a Development Agreement executed by both parties and not as property taxes, it wouldn’t require an amendment to the MGA although it would still be registrable on and enforceable against the title, not the owner (just as zoning applies to the land, not the owner).
This would remove the financial incentive for an owner to demolish and hold for future development or sale. This subsidy in holding costs has been “banked” by Regency for years and would continue to be “banked “ every year by Westrich should they purchase the lot. The City shouldn’t be asked to subsidize their holding costs over and above that by approving/allowing something they shouldn’t approve/allow.
If Westrich can’t afford to “carry” the site and comply with the current zoning, they either shouldn’t purchase it or they should negotiate a lower purchase price. It’s not up to the City to subsidize their business operations generally or on this site in particular.