It's clear that switching the View works for some, but not all users.
The Smile submissions go directly to the program managers. Even though that communication is one-way, be assured your submissions are going to the right place.
That $499 gives you access to a support specialist who probably knows little about Excel for Mac. You were wise to skip that.
There's a way you can interact directly with Excel developers for free, but it comes with many caveats. You can join the Insider Fast program and use beta software. It is not supported at all even if you pay the $499, but you do get a direct channel to interact
with Microsoft developers in a special Insider forum. The goal of the Fast program is to give Microsoft user feedback on new features, updates, bug fixes etc before they are released to everyone in a general release. The builds sometimes will have new features,
incomplete features, bug fixes, experiments in user interface - in other words you're getting a build that could be the future - or maybe not. The builds are larger and more frequent than regular updates. If you don't mind using builds that are generally good,
sometimes outstanding with new features no one knows about, and occasionally messed up or broken in unexpected ways, then go to the Excel Help menu and choose Check for Updates. In AutoUpdate check the box to join the Insider program and then choose the Fast
option. If you just want to get the supported general releases ASAP join the Insider Slow program.