Eric,
Thank you for your persistence in working with the Evernote staff on this little oddball problem. I'm also using a MacBook so control-click was what I was using although I do have an external mouse. I tested your theory and indeed I am able to bring up the suggested/corrected word with a right-click within a table. Having a pad or mouse is irrelevant to me so I will give the mouse a shot for a bit to test if there is any fallout within Evernote.
Otherwise, you are correct, this is a solid workaround (for those who have an external mouse).
PS: I can't quite hit the "Mark as Solution" button but it sounds like you are awfully close to getting that designation!