The Alt-shortcut lag problem in Excel with Parallels is what is making me to use Bootcamp instead of Parallels (and the lack of those shortcuts what's making me to use the WIndows version instead of Excel for Mac...)
Would be so great if you fixed it
PS: It really seems to be a problem with the Cmd-key. Upon using SharpKeys to remap the Mac-Alt key (=Windows key) to the Mac-Cmd key (=left Alt under Windows), one can use the Mac-Alt key to access the Excel ribbon without noticeable lag. Unfortunately, one has thereby lost the Windows key and a circular assignment/swapping of keys does not seem to be working using SharpKeys.
Last edited: Dec 28, 2017