Speaking as one who always tried to make "brownie points" with the in-laws and failed.......I can tell you that you are wasting energy to even wonder about what they are thinking. They are going to think whatever they "want" to think about you. I hope if there is just one piece of advice you take from me it is not to imprison yourself in that area of worrying about what his folks think of you. I KNOW.....very hard to do, especially if you are a people pleaser....however, it won't change their minds either way. Hopefully, you have earned your own favor with them and it's not based on just being his W.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!