I will admit, I stopped watching the let's plays too. Drove me up a wall. As I was watching the videos, here are a few cents I threw in:
-I respect the guys who made the let's plays, but after watching them ignore that citizens were dying and buildings were burning down, I clicked close and decided to wait.
-Sometimes I forgot I was watching a YouTube video and clicked the screen out of impulse.
-Chirper did appear to get in the way sometimes, but it wasn't over-the-top. At least a function to silence it has been implemented.
-Pear-shaped neighborhoods?!
-For some reason I had an almost OCD urge to connect every water pipe as opposed to having them dead end, like in some videos. SC4, I guess.
-Those interchanges. I yelled at my computer screen almost, as I watched them completely fail to make some average intersections. When a certain YouTuber attempted to make an interchange that would have effectively been remedied with a diamond, I introduced my head to the desk. The ones built took up far too much space and, although efficient, looked fugly.
-There should definitely be two-lane off ramps and at least 5-6 lane highway segments.
-When Quill18 drew that off-ramp that created that 90 degree drop in the boulevard, I died.
-Another thing with roads. a lot of cities always have a main boulevard where business, and most of its traffic, is generally done. It is generally referred to, as Main Street. I'd like to think that the main road entering a city should be of a capacity large enough to accommodate any sudden change in traffic flow.
-Power was always an issue. It was always borderline. At this point I usually plop a crap ton of power sources until the bar shoots for the sky. In SC2013 I had 1.7GW of power just so the dial was never close to running out (yes I know it's overkill).
-I believe in an efficient city, even if that means playing by leveling up. Starting off with a plan first solves problems later. Many of the info views aren't available right away, but if your city still has room to expand then building a farm district right next to a residential district early on (even if the ground is fertile) isn't such a good idea.
-The water pollution, although the water physics in game were absolutely incredible, still kills me. Maybe in map editor I'll construct a huge crater to dump sewage into. By the time it fills I'll have the treatment plants unlocked, and modified so that they treat at least 97% of the water and not just some, much like real life. Hmm...I wonder if at some point in the future, a Cities of Tomorrow-esque pack till emerge that will allow me to clean murky water? That'll clean the water and make it drinkable again. XD
-I hope the Let's plays put to rest the underground power connections. It's obvious that you can delete power lines when they aren't necessary anymore and the radii of power round the buildings seemed adequate.
-Holy hell, the map takes way too long to fill, especially with good city planning. When I saw the 25 tiles and thought of a megalopolis, I thought of an Advil for some reason.
I agree with all your points.
Although i don't understand why the obsession with space-efficient interchanges?
I'm a guy who likes to base road planning to real-world, and real world interchanges are huge.
The problem with neat and space-efficient game interchanges is as follows:
1.) Too sharp turning radii.
2.) Too steep inclines.
I'd 15000x rather have an ugly interchange, that has a gradual slopes and gentle curves, than a packed interchange with steep hills and radii that trucks in real life would have hard time following at decent speeds.