I'm not really sure I see the benefit of the new global action bar at the top of the page.
It takes up a huge amount of useful screen real estate, where before, the "+Task" button and tools buttons in the bottom-right took up no additional space, and the Profile icon in the that used to be in the bottom-left also took no additional space up.
I also don't see the need to have a big search box on every page, where a small search icon on the left sidebar does exactly the same thing with much less space taken up.
On top of this, being dark when not in dark mode is visually very distracting.
I also think it would still be distracting having this search box at the top of the page even if it was light, as you just want the middle of the page to be the view you intend to see, and the content you need from that view.
All-in-all, I would really encourage a rethink of this global action bar that takes up a tonne of screen space and is very visually distracting.