HI dtayl20 ,
Thank you very much for your post.
I have good and bad news for you and at the end even better :-)
Good news is that warehouse management and ATUM web app will come in future. It will connect and sync any shop there is including Amazon, eBay or Etsy.
The bad news is that we do not support 3rd party plugins we are prepared to build. So ALL import export will not work with MI.
The even better news is :-), that we are in the final stage of our own Export-Import premium add-on and that one will handle anything you throw at it. (release planned end of July).
Hope it helps.