IIRC Downtown Mississauga doesn't have maximum heights or densities - but they're strict on the parking ratios. This speeds up the bureaucracy.
We will agree to disagree, but the city core did, does have maximum heights and densities requirement as well non strict parking ratio. The last few years, the city has started to move away from these low height and density requirement and it started with M City. Anything over 40s was taken behind closed doors and told it not going to happen. Parking was to be 1:1, but was increase to 1.25:1 and that was a running joke at council. It was stated time after time that on move in date, not 1 car show up, but as many as 4, with the other 3 looking for a place to be park. When Developers wanted to reduced parking ratio, they were told no. With the coming of the LRT, parking ratio is falling now.
Since council is the Planning and Development committee comprised of all councilors, less hoops to jump through to get approval and faster in the ground if the developer do move forward with them. There are a lot of approved projects in the city core and elsewhere but haven't gone any further than that, except for a few.
There is no Downtown Mississauga and the closes you can get to it is Hurontario and Dundas. Even that area has had so many approvals, but gone no where.
When one looks at M City and Parkside Village, it's night and day between these sites. Parkside Village is an example where Height and Density is lower because of Council. Same can be said for Pinnacle Uptown project.
It took until 2005 to get a building over 39s, Took another 12 years to get a building over 50/56s. Both Parkside Village and Pinnacle Uptown will have 2 50s towers. Edge Towers will have 1 50s. Other than that, no other buildings plan over 50s other than this one.