Yes, it is a long-standing, gaping hole in ID’s capabilites, much discussed and frequently requested. Adobe’s bug report / wish list is here: <https://www.adobe.com/products/wishform.html> ; you could add your complaints to those of others. If you are active on Twitter, a series of tweets with a creative use of hashtags might serve to bring new attention to the issue. Fresh voices can be a help ; some of us have been complaining about these faults for so long that I’m sure the InDesign team has a special box labelled ‘Grumply Old Malcontents’.
On the other hand, my layman’s impression is that coding notes for tables is not a trivial task because of the way content is contained in cells. <GOM>My opinion, for what it’s worth, is that the implementation of tables in ID is fundamentally flawed,</GOM> but that’s another discussion.
And, I think I recall hearing that Adobe would be addressing this fairly soon; can’t remember the source at the moment.