I had a completely different situation last year. Checked in via QR (no account needed), ordered my drinks, got them quick, could also pay them with PayPal. The last thing was great because I hate waiting for a waiter to get my bill and pay it. And I could add tips in this 'app' as well. But maybe I was just lucky that my first experience with QR-codes in a restaurant was so positive.
I've had similar really good experiences, but it's probably just luck. The last place I went to they used https://pos.toasttab.com/. It was quick, easy, everyone at the table was able to pay for their own food without having to worry about dividing up the bill, it was easy to order additional items without having to wait for the waiter to come around, etc. And, fwiw, it didn't seem to affect the social aspect of my dinner at all. Normally we all would have been sitting quietly looking at the menu, instead we all sat quietly and looked at our phones. After we ordered, everyone put their phones away and we had a good time.
It's been hit and miss. I've had good and bad. The best I've found are;
1. QR code to PDF of full actual menu. If they direct you to a HTML page is usually awful and is accordion based mobile UI that involves a bunch of clicking in and out. A PDF can be zoomed in/out but all the content is right there.
2. QR code to pay. This is great when it comes on your bill and you can just pay and leave. However, if it allows Apple pay it's very smooth. Unfortunately, most of the systems involve a web based checkout flow including manual credit card entry and capturing more info than is really needed (email/phone) so they can spam you later.
I suspect that you are not the person who decides which feature will be implemented? So first I would try to understand how the management or a product owner normally decides which feature is next and which KPIs are used to make a decision. And beside that I would listen to the needs of my clients (I know that this sounds a bit too easy). Are they happy with the product? Do they wish something else? Is there a platform for enhancement requests etc. where you can match your idea or just talk to the sales-people as they normally know what clients miss in features.
I am a middle manager, so have quite an influence but not ultimate decision. I do have to justify projects to my managers. The KPI is clear, we are trying to increase the sales. But the product is so large that it is extremely difficult to measure the contribution of a single feature.
Also, the client base is very large and as I mentioned thousands of sales persons so no matter who I ask I can't get clear answers. That's why I'm trying to find a measurement that somehow averages the answers.
