TACC of TM3 is maybe the worst I have driven. I admit that one reason for being is that Tesla could easily fix these issues (which many are just preferences) unlike any of the previous cars that I've owned. Most of the issues are related to speed limit data which is wrong more often than right. The newest update is step to the right direction now that the car can see at least some of the speed limit signs.
Arbitrary max speed for autopilot is just stupid. Because speedlimit can be off even +40kmh I'm now able to drive +50kmh above the speed limit with AP on which of course is not very smart. But the system allows me to do it. And of course I can always accelerate more with pedal and system still allows it to autosteer. On the other hand autopilot is useless on roads where the actual limit is more than the car thinks because the max offset is not enough. Max allowed speed should be what the autopilot thinks is best it can do related to the road curvature, width, weather and what ever parameters they use.
Why the fck it doesn't catch the present speed when activating. Drives me nuts. Again 2020.36 makes things tiny bit better when I can touch present speed and it transfers to the TACC target, but it's still annoying and unnecessary to do every time I activate AP if the speed limit data is wrong. Now it even resets every time when changing lanes and reactivating AP. I'm not sure but I think it didn't do that before 2020.36. So the system works great only when I want to drive very spesific overspeed and when the speed limit is correct, sot that's maybe 25% of times I'm driving. I absolutely hate it when Elon and Tesla thinks they have very clever idea to automate something and they force it to you without option.
I would actually pay for rock solid basic TACC without any automation related to anything. Set the present speed when activating and don't change it yourself. Then, if I want, I would like to touch the speed limit sign and just then set the target to that + offset. Maybe double touch and activate active speed limit mode where the car accelerates and decelerates according the limits it thinks it knows. What if I could press and hold the speed limit sign and it would give me small submenu to select right speed limit. There could be blue lines around the sign so that I know the system is active, just like there is for TACC and AP. I guess someone likes the current system and would want it to be default. Great, give us an option for that.
I would also pay extra for even dumber cruise controll which wouldn't use radar or cameras. Of course this would happen only with warning notification when TACC doesn't have data it needs to work and it reverts to dumb mode. This would be great when radar is blocked by ice and whatever or when the sun shines directly to cameras just above horizon. The current system doesn't give any CC in conditions like that.
In stop and go traffic AP and TACC leaves way to much space between me and car in front. And when traffic moves again it reacts way too late and aggressive. I would prefer smoother and slower acceleration but faster response. When driving in high way and car in front of me changes lane or exits my car accelerates way too late. Many of these things could be in settings with some kind of slider or couple of presets how aggressive or smooth car is in different situations. Just like there is for auto lane change in FSD.
