I would like to chime in by saying that I quickly open a new tab to check something and then close it all the time. For example, I might be reading a post in one tab and come across a phrase I don't know the meaning of. So I will CMD+T, look it up, then CMD+W. Instead of returning to the last tab when I CMD+W, it just focuses the last/rightmost tab.
For example:
- Open apple.com
- CMD+click on "Mac", "iPad", "iPhone", etc. to open them in new tab
- Hmm, I wonder what Microsoft has to offer? CMD+T, do a search query for "microsoft"
- Change mind, CMD+W to close results page
At this point, I expect Orion to take me back to the first/leftmost apple.com homepage tab, because that's where I left off. But it puts me on the last/rightmost (formerly second-to-last) iPhone tab. This makes Orion unusable for me which sucks because I really love everything else.