The park is quite actively used during the day, almost overused. The difficulty addressing the park is not underuse.
Buildings surround the park, all of them active and most in good shape. There are a few small gaps here and here, but mostly the streetwall is continuous.
The southern end of the park at Gerrard is lined with historical intact homes. It is also home to the notorious Seaton House shelter, and multiple historical homes that have been converted to rooming houses and shelters. The shelter acts as a primary stressor on the area.
The difficulties facing the park are not ones stemming from lack of people, lack of surrounding buildings, shadowing issues or park neglect. The major issue facing the park is that of gross income disparity.
The southern end of the park tends to deal with poorer people, the north end, with the better off. The park is surrounded by 'eyes on the street' - but many of the eyes belong to troubled populations, people with addiction issues, the poor and indigent.
The park doesn't seem to attract as many pedestrians from Jarvis Street, as from it's other three sides. This is not from underuse of Jarvis by traffic, but more in line with the unpopularity of Jarvis as a comfortable pedestrian spot.
Jarvis street facing the park has a few sizaeable gaps where buildings could go, and the blind side of the Primrose Hotel to contend with. These few gaps could use new construction that would help unify this side of the park architecturally, but I can't say I feel this tower as proposed would help with that.
Putting up a 50-storey tower here on one side will not do much to address the larger social issues of the area.
I think a gentler approach to the park and the buildings around it are in order. A city program directly aimed at moving the overbearing concentration of shelters and poverty out from around the park area would be of enormous benefit. The importance of this to the area cannot be overstated. Personally, I believe Seaton House must go. A more fine-grained and equal distribution of shelters and services around the city would only be fair, and this would allow the restoration of these historic side streets.
Encouraging new construction on a scale that helps maintain the charm of the park and the historical side streets would also be a good idea. Mistakes have already been made around the park perimeter, notably 140 Carlton - an ugly building, badly situated. We don't need more buildings of this scale that could look like future mistakes, here.