I took this picture of Keith Hall a few years ago:
It has been in rough shape for a long time but if the restoration is well-done it should look quite impressive given the detailing. It has pretty unique features (stone portico) and reminds me a lot of large urban houses built during the same period in parts of the UK. It is also part of a heritage streetscape along with Benjamin Weir House, Black-Binney House, Government House, etc. The only other cities in Canada with residential architecture, or really any architecture of this sort of age and quality are Montreal and Quebec City, and they have different building styles. This streetscape is definitely of national significance.
In addition to the plan for the Alexander tower, there are plans for a building called Halkirk House between Keith Hall and Weir House, and there are plans for another building on the corner of Hollis and Bishop. If built, those buildings will complete a nice stretch running from around Salter to Morris.