So to piggy back on everyone else saying the new layout is terrible, calling that a customizing layout is wild because I want to customize it so it is how it was before but I can't, it's literally not customizable things just got moved. If you're going to call it customiziable give is the option to put everything where we want it.
My second issue is that I can no longer drag and drop between files to add sheets, I have to copy and paste, but I can't copy and past with my keyboard, I have to copy and paste with my mouse. These have made my work so much less convenient and more time consuming. This should be adjusted for ease of combining documents.