Couple of initial thoughts after moving to 15.6:
- Regen for me has regressed . Seems to have gone back to how it felt before 12.2; noticeably weaker and seeing more reduction from the dotted line. Weather isn't particularly colder here; in fact it's generally milder than a month or two ago, as you'd expect.
- UI seems to be rendering more traffic travelling in the opposite lane. Can't be 100% certain but do feel I'm seeing more than I used to.
Also, more of a general observation from 12.2 & 15.6 .... I've not see any warnings from the cameras about being blinded (due to the sun). This used to happen often this time of year, on sunny days early morning/late afternoon when the sun is low - however, nothing since 12.2 and zero AP disengagements due to camera issues.
BTW, still waiting for the 2021 Map update.