Been playing again, after some time spent in D3. I really love this game. I went back to a test city, on a custom map I made to learn how to do it, and have been using it as a sandbox to learn how to get things done. Whelp, it's at 80k now (no cheats, legit play, only a couple mods), and looking like a real city.
The only thing I hope they work on for the next DLC is getting tunnels sorted out. I miss the auto-tunnels in SimCity4, getting trains and highways through mountains is just...awkward.
Wishlist:
Better tunnels.
Area demolition. Removing train lines and highways from custom maps is beyond tedious. Put the same tools as zoning into the bulldoxer, PLEASE.
Rail/Metro interface.
Cul-de-sacs.
Under-ground power. C'mon.
Better rail tools, like switches and crossovers.
Deeper seas, higher mountains.
Ferries.
Small, municipal airports- and adding freight to the airports. We live in the age of UPS/FedEx, after all, and they have MASSIVE flight hubs.
Bigger farms.