I'm all for ornamentation, but I don't think adding a bunch of splashes of color just for the hell of it (to keep it from looking too 'plain') is the way to go. Tons of buildings in Edmonton are needlessly busy, and it's tacky.
More broadly—architecture is a language, and a 'featureless white box' is something that stands for something architecturally. You can go to any German city and see many buildings that look like this render and understand the milieu from which they emerged, and to replicate that elsewhere might be taken (convincingly or not) as an aspiration towards the same ideals that animated that milieu.
There will be positives to having Lotus and Lilac Park downtown, and I wouldn't say they are functionally suburban developments, but they sure look suburban—or like the off-campus housing near any university circa 2015.