I have downloaded and installed the preview and was very excited about the shortcut keys being mirrored, as the lack of the same keyboard shortcuts makes the Mac version of Excel almost unusable for me.
The good news is that ctrl and shift shortcuts now work as per the Windows version. So for example you can select a row with shift+space and the insert a new row by using ctrl+shift+'+'. You can also use ctrl+c to copy, whereas before you had to use the cmd key. So that is a change for the better for Windows users
However, having used it for a short time, I think that you and I are going to be out of luck in another department. My most used commands involve Alt key sequences, e.g. Alt-E-S-V for paste special values, or Alt-D-S for sort. From what I can tell so far these are still not possible. Pressing alt after copying a cell does nothing, and I've tried every other key combo that I can think of to see if there is an alternative. It's possible that they may add this functionality in a later build (some features are still missing and have messages saying that they are not included in this build) but I'm not going to get my hopes up.
Another missing feature at the moment is the ability to customise the Quick Access Toolbar, but there is an option that is greyed out in the menu bar, so this will hopefully be included in a later build.
Overall, this is a step in the right direction for power users coming from Windows to Mac, but unless they add the alt sequence shortcuts that we are used to in the Windows version I'll be sticking with Parallels and the Windows version on my Mac.