Things not yet fixed.
1. The temperature offset, which Bjorn Nyland thinks is not an offset as such, but is due to the set temperature being the temperature of the air coming out of the ventilation ducts, not the temperature reached in the cabin. He thinks this is a common thing in many Chinese-made cars.
2. THE INFERNAL AUTO-LOCK! It still can't be switched off, as it can be in the Trophy, and it is literally driving me out of my freaking mind.
3. The colour of the battery SoC indicator. This is supposed to change from green to amber at (maybe) 50%, then from amber to red at (maybe) 10%. Very few cars actually do this, although there is video where some do, and a couple of owners have said their cars do it right. God knows how, because in most cars it stays green the whole time, except that the amber colour gets lonely and sometimes appears randomly irrespective of the actual SoC. It's possible it regularly changes to amber below 5% charge, but since few people go there, nobody is quite sure. (Someone suggested it was a decimal point thing. Instead of amber at 50% and red at 10%, we're getting amber at 5% and red at 1%, but nobody has gone to 1% to find out.) It's a small niggle, but hey, come on!
Things not fixed right.
4. The switch-off of the LKA. @siteguru says that it's not a one-tap off as indicated in the video. The one tap still gets you that "are you really sure you want to do this?" confirmation dialogue box, which has then to be tapped again before it goes off. Not useful if you need it off in a hurry. This needs a physical one-press button, not messing around on a touch-screen as your car is trying to drive you into a pothole. Also, since most people who turn off the LKA as part of their pre-flight routine also turn off the speed limit recognition at the same time, and the speed limit recognition still needs the old procedure to turn it off, I don't think this innovation is much practical use.
5. The thing about the audio volume. But I always use incremental one-tap changes anyway, so it's probably not a biggie.
Things that have been fixed right, and the reasons I'm dying to get the upgrades.
6. Heating the car (and the battery) when plugged in but not charging. This is a bigger deal than I had realised, because if you're about to start a long journey and you have your car at 100%, then you have to unplug to get it to heat, bye-bye to a significant little chunk of range. Now, apparently, the car will take the power from the mains to do the heating, even if charging has already finished with the car at 100%.
7. THE USB AUDIO PLAYER NOW WORKS! This was a big gripe of mine, that I had to spend literally days renaming files as a work-around for the player not supporting folders. Now it does.
8. The auto-lights no longer come on when the sun goes behind a small cloud, but at dusk, when you expect them to.
9. The radio no longer comes on when you sit down in the car regardless of whether you had turned it off before you got out. I'm not sure if it remembers its previous setting or simply waits politely to be turned on every time, but either way it's an improvement.
10. The external temperature display. That was present on R13, which is what my car came with and still has, and I rely on it for a lot of things. It vanished with R16 and was still absent on R21, and we got a lot of rot from at least one MG dealer along the lines of it was never meant to be present on the SE, the base model owners shouldn't expect such luxuries, and as soon as MG realised it had been enabled by accident they put out R16 to remove it. I wish MG-adjacent people would simply fess up to a goof-up rather than infuriating owners by trying to pretend it was intentional. See the excuses for the undertray warp. But it was a goof-up and they fixed it. I think a lot of new owners were complaining about the read-out not being there.
