Hi Rick, thanks for the thoughtful feedback.
1) Agreed dock-to-top makes a little less sense on tabbed groups, but, we do keep that behavior for consistency.
We have a new option coming up this month to switch tabs on mouseover. We're considering adding an option for enabling this specifically for docked tab groups, so it comes up to whatever your mouse enters. Likewise, we're introducing options to "Require clicking headerbar to expand", which likewise makes it more accessible, as the roll-out won't occur until you click.
We realize that all of these are somewhat klugey solutions, but we're working to work our way to the best defaults as possible.


Regarding "Unchecking move-to-bottom doesn't work", we weren't able to reproduce this not working – but as you note it seems to be about poor instructions. So we'll take that into consideration as well, and will look to improve that instruction. Our first attempt (below) errors on the side of verbose, but it will at least be more thorough.
From what we can tell it does work once you pull the group off the top and put it back. This is necessary as we don't want to do anything to break your settings just by toggling that setting.

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2) Regarding tint applying to all icons on desktop. While we agree that this might be odd, in testing we did find a preference for tint applying to all icons, under the idea that tint's benefit is to provide the entire desktop a uniform look, for a distraction-reduction benefit similar to Chameleon but with a user-specified fixed color. We'll continue to consider a checkbox for "Only apply Tint to icons in groups".
It's possible to achieve what you're looking for, but more tedious and with more work. You can turn tint off at the "All groups" level, and then turn it on to match the background color on a per-Fence basis then copy that customization to all the other groups. It should take about a minute to pull this off, and it does make changing the color much more of a headache. Sorry again for the inconvenience and we'll continue to consider improvements here.
3) Agreed, a lot of non-optimum settings UI choices. Again we'll continue to look into improving in the future. The idea was to get that "More option" option "above the fold" rather than down below, requiring scrolling to find. It does result in a weird split. And some of the "More options" options relate to the background color/appearance, and some do not. So yes, continued things to consider there but such is the problem once you have a lot of knobs like we offer. The more knobs, the more confusing it becomes.
4) Agreed, the popups are non-optimum. Again this is somewhere we could improve in the future but for right now is meant for basic onboarding instruction. We provide "do not show again" so that after the first experience with them, one can dismiss and not have to see again. Again noted the room for improvement. While we'd like to get rid of it, we're unfortunately not aware of any reasonable way to disable the "ding".
Thanks for the feedback as we continue to work to improve the product experience long-run