Not to belittle the project because it looks really nice but have you tried the pinch gesture on the trackpad to zoom out and see all your tabs at once? I don't know if it's always been there but apparently there's a box for search tabs.
- I can filter tabs down but can't select them without my hands leaving the keyboard.
- I can't switch between two tabs really fast. My workflow often involves alternating between two tabs.
- Tab overview does not have multi-window support which is important to me as I am often working on multiple monitors with multiple windows open.
- I can't quit, pin, mute a bunch of tabs using the Tab Overview with just keyboard shortcuts.
Basically Tab Overview isn't for "Lots of Tabs" users.