Hi
I started using the new interface. It's a bit disappointing at the beginning but there are new nice features and I globally like it.

What still hurt and I do not like like it is the UI of the inbox which affect the UX and my efficiency .

Unread message : light gray
Read message : gray
I would do the opposite ... having all the rows in gray is not pleasant , uncommon ,....

selected message / line in the grid : remains gray ( not specific colour syntax to clearly highlight the selected row )
There is this new a little blue / violet shape color in front on the row , but that's too subtle and not pleasant / efficient when scrolling , deleting messages ,,,,

I tried to get used to it , but after 2 days I feel that's less efficient than before or compared to other mail boxes ( outlook , gmail ..)
I'm pretty sure it's not only a personal feeling / perception.
A little rationalisation / improvement of the UI/UX part would make this new version fantastic.
At least being able to choose the background colour of the "read / unread / selected" message

Best Regards