Great feedback Steve and something I touched on recently too, about nearly all of the same points.
In regards to the Online Ordering opening on a separate tab; do you know that the Product Managers actually told me they switched on the ability to have it open inside the website and they saw a 50% decrease in conversions, so they put it back to the old way.
I think this is complete and utter rubbish and in fact just an escape route because they couldn’t actually fix the issue.
The issue we have is, Wix Restaurants solution was acquired by Wix, it used to be a company called OpenRest, and the founders came to Wix and built the product into the Wix eco system, however, they are no longer working at Wix, meaning the product is basically kinda redundant (well, it seems that way) if Wix would comment then we would know but they haven’t bothered to give a comment on why this app hasn’t gone anywhere or been updated. Still waiting.
I agree with all of your points though, 100%!