That's not a solution, nor is that acceptable. If Microsoft is going to dumb down the Mac version then charge Mac customers less money than the Windows version. Period. You care more about looks. I care about functionality because at the end of the day functionality gets the work done, not "prettiness". If Apple was pulling this stunt making the same software for multiple platforms and charging the same money for all platforms yet the Mac customers get a lot more for the same money there would be lawsuits left right and sideways. There should be a lawsuit for how Microsoft cheats Mac customers but charges them full price.People and their personas are so varied. I don’t expect anything.
But to entertain your point, I expect that if they need those power user features so much, to an extent where they cannot function without them, then spin up a Windows VM for those specific use-cases and use Outlook for Mac with everything else.
Not saying that is ideal, I have no real opinion on it, just giving you a solution.