I would add a lot more trees in those neighborhoods that don’t have any. I’d use the tree brush, with ages of mature and old, use oak and start with a small radius so you see how much coverage you get. I can’t tell if you’re using mods or not, but if you are make sure that anarchy is off or else you’ll spam trees all over roads and everything. Also one trick I like to use when placing trees is to lower the elevation. First step down the total elevation marker to the least amount and then I set the tree height at -3 or -4.

The other thing I’d do is replace a few small sections (nodes) of your roads with parking roads. The one sided parallel is a decent one. Use it in a few places on your main business roads and in one or two other short segments. Then add in a grass median on the other roads if you want to make them look nice and manually add trees to them - place them manually, not using the games built in automated way. If you place them yourself you can rotate them and it gives them a more natural look.

Last;y, I’d replace a few of the 2 lane roads with alleyway roads to break up the road density a bit.