Hello,
Thank you for reaching out. I'll answer your questions in point form with each paragraph answering the respective question 🙂
ANF will not come to Xbox, at least not something we have on the radar. While the functionality is supported, the performance hit is too big to justify its addition.
Perhaps. I'll forward the suggestion and we'll take a look.
We are focusing on delivering the aircraft to the MSFS2020 Xbox users then move on to getting it up-to-date for both simulators.
We are looking into it 🙂
The taxiing, according to our 350 pilots, feel is accurate. We recommend completely linear curves for any peripherals then tuning it according to what feels better for you. There's no definitive answer aside from linear.
Hope that helps and that you'll continue to enjoy the A350! 😄