I fully agree with both points of your post :
What MS/Asobo have achieved, in particular with the world and weather system, is remarkable and the continuous work on new aircraft and mechanics such as helicopter physics and dynamic thermals is fantastic - truly going “above and beyond” expectations, and to release this for free is a great gift for simmers to celebrate 40 years of MSFS. Thank you to everyone involved, from the devs to the managers securing budgets for this !
I do agree that the VR side is very neglected. I think the quantity of obvious VR bugs that have been included in (mandatory update) release code on so many occasions suggests that there is not even someone consistently testing in VR for a few hours, let alone a dedicated team! I have often tried to identify issues and post about them in the forums, but when there is no acknowledgement of bugs even being noted it can feel a bit pointless. The bugs are often relatively minor things that would be quick fixes, but have a big impact on VR users.
I don’t think MS/Asobo necessarily needs to see it as a big investment in a VR team as the mechanics and compatibility is already there, and the problems as you say are usually usability or minor (but obvious) bugs. For example I think a big improvement could come from just committing to having a couple of people run some FULL flights in different aircraft and scenarios with and without VR controllers - or even just someone regularly monitoring and liaising with forum posts / bug reports with a mandate to raise and fix them, I think many of us are very happy to try to help identify and diagnose these issues.
I am sure this will be resolved at some point and hopefully soon, many of us (including some of those currently battling for the magnificent title of “oldest flight simmer”!) find the immersion of VR to be such a game changer, for many it is the future+present of simming and by far the best way to be immersed in the world that Asobo has created 
