I know you can create perspectives that show whatever tags you want or don’t want to see. What I think would be amazing is if you could momentarily filter tags from within any particular project or perspective.
Imagine if you would look at a work perspective and filter by high priority without creating another perspective.
This is the main thing from Things 3 I wish OF would add.
Having just made the fip back to OF from Things (for the umpteenth time!) I didn’t realise how much I used this. The net result of this is that you have to have many more Perspectives than you otherwise would have.