Not Lake Bonavista...but I live in Rosedale, another neighborhood which is basically all single family units, where I'm hearing way more discussion about covenants. Why? Because of the blanket rezoning, currently there is an 8-unit development being proposed now (replacing one house on a street of single houses). Im not old (well, relatively speaking) or mortified of change...but even to me this feels wildly jarring for this street and community. So I'm not surprised that older people with more time/money are losing their shit and looking at restrictive covenants. When all nuance is lost, people go for the sledgehammer.
I'm sure the blanket rezoning will makes things easier for development, but to me it does seem to disregard context too much. I don't think every neighborhood needs to be the same, or cater to the same goals. It's ok to have ones that are really dense (Beltline/Mission/EV), some cater to younger families or 20 somethings (ie Bridgeland), some that are weird (woo Inglewood/Ramsay!) and some that maintain a more quite/car-centric presence. Choice is good. Not everything needs to be the wet dream of an urban planner.
Here in Rosedale, this is a neighborhood where added density should be done through contextually designed garage suites, or higher-end duplexes that fit in with the more traditional heritage aesthetic. You'll still add that density, but in a way where the character of the neighborhood is preserved. Many curmudgeons would hate that too, but I think generally you would get buy in, especially from the younger people here. Talking amongst all the parents at school, the last thing that most of us want is the for the neighborhood to turn into Hillhurst where the older houses are torn down and replaced by 3 story "modern" shitboxes (I should know, I lived in one). I'm sure that makes us racist/classist, but hey, such is life.