Obviously the current Lebreton plans are better than status-quo but when you look at the plan as a whole it still has a lot of empty fields and holes. If you were to calculate the actual density of the proposed new developments as proportion of total land space, it would probably still be fairly low.
No height here, no density here, nothing in front of the war museum, nothing too close to a monument (that would be impolite), etc... you end up with a million reasons to scale back and settle with something very a-la Ottawa.