That render of the Halifax Stadium looks like the original BMO Field minus the larger end zone stands on the south side for the supporters group. It looks like a 17-18,000 seater instead of the proposed 24-26,000 seat stadium. The permanent side certainly does not fit 12,000 as they suggest - you can tell just by looking at it..probably closer to 10,000 if that.
That render probably has as much effort put into it as the original CalgaryNEXT proposal from a couple years ago
I'm sure a more detailed render will have a larger permanent side with 5 levels similar to THF (first deck, suite level, club level, upper deck and press box) but maybe with a slightly larger capacity as I believe the one side of THF only seats 10,000. The opposite side would clearly have more than the lower deck seating in the render to bring the venue anywhere close to 26,000.
The big concern would be minimal seating in the end zones like THF. The stadium not being fully or partially enclosed probably means they were be several games with winds in the 50-80 km range (like in Hamilton) detracting from the level of play on the field. This is one of the major flaws with THF, and sadly, will likely be an issue with the Halifax Stadium as well due to an extremely tight budget.