It kind of worked for Bayshore and Corners of Brookfield? They are different types of malls, though. I'm not sure that I would want to pay money to live at Mayfair.
The most powerful factor in housing prices is the ratio of supply to demand. While the trends of corporate landlords getting larger and diminished proportion of new non-rental housing are concerning, building more housing of any type helps resist across-the-board price increases. Madison over the past few years is unfortunately a great example of what happens to the cost of housing when there isn't enough supply.
More housing is always better than less housing. Something tells me that these are going to be "Luxury Apartments" though (priced at something like $2500/mo) and folks who are downsizing will willingly pay it because only 25 total condo units have been built in Milwaukee since 2011. We need more housing to drive down costs but we need more housing in more categories (market-rate apartments, luxury apartments, and especially condos).