Tables are on their way out I'm afraid since they do not work for screen readers for visually impaired persons. The whole web is moving away from tables.
That said, they have their uses and I would like to see table features in the editor as well.
This is as good of place as any to make your suggestion and I'll add my voice as well.
I'll point out though that there is a plethora of online HTML table generators out there on the internet. I just go to one of them, create the basic structure I need, copy the generated code, paste it into the HTML tab and then add my stuff.
One note though on the table generators. There are some of the styling attributes for tables that are now depreciated, but the table generators have not yet caught up with that, so they most likely will require editing and changing of some of the attributes over to inline CSS styling rather than the old depreciated attributes.