I see improvements mentioned (FM direct tune, nav from phone, ignore toll roads and HOV lanes, speed limiter). This is certainly more than nothing. Also, I see a fair amount of "I hate the new UI" which you get no matter how you change the UI. Some people see to like the addition of games. The early bugs seem to have gotten fixed, and the camera on top issue resolved to most people's satisfaction. Also, some newer improvements seem to have gone in as well. I'm afraid I'm not seeing that V9 was a downgrade.
In any case, the complaint I responded to was just "some feature changed in V9 and that sucks", not MC1/AP1 was impacted in a particularly bad way. So I don't see that I needed to go research something irrelevant in order to respond.