In that case for a proper location to keep the DT in view would need to be West of the CN Tower. Aka...Exhibition Place, or if Billy bishop closed (doubtful). Not much free land anywhere else, unless they buy a whole neighbourhood.
Try this on for size............
I hear there's some 'air' for lease/purchase just west of the Dome over a railway corridor.
If the Jays can finance the new stadium, and signed a 125 year lease w/the proponents to finance the deck, you could put the new stadium there.
You could then replace the Dome with a 10 acre park with a good shape, that isn't strata, meaning you could plant trees to grow for the long term.
In the above scenario, the City gets out of spending a bundle on a new rail deck park.
The Jays get a new stadium site within 3 blocks of their current location, downtown.
The City picks up the land lease from Canada Lands Co for the Dome site, and eats only the cost of demolition and a new park.