While I generally build more than I play, and often build things I may not personally use. I do keep in mind those things you mention. And I play test specifically those parts where I expect issues to arise, even though I rarely use MOO. I probably miss some things though.
For example the outdoor restaurant, ever since seasons I make sure it has at least a roof and patio heaters. I generally test restaurants more extensively than other lots because they're more likely to have routing issues.
Or if I build a family friendly lot, there are facilities for toddlers and preferably near the entrance, so they can get there without being carried.
I also always add a thermostat to community lots with buildings. Several toilets, something where they can eat, etc. And a woohoo spot, you never know where your sim gets asked in a date ?
Recently I've also been more mindful of the 20 sim limit a lot has. No need to have 15 tables at a restaurant when no more than 8 will ever be occupied at the same time.
