+1 for the return of the sync button.
I've been an Evernote subscriber for almost a decade and am seriously considering moving to another tool because of: (i) the delays in syncing between devices; (ii) the delays in the appearance of notes emailed into my account; and (iii) the plethora of duplicated copies of notes. None of this happened before. I would just force a sync and all was fine. It seems crazy that the suggested "solution" is to install an old version!