I've been running offline championships for many years, and despite the update, my community and I purchased BOOST to try out the new offline mode.
Today was our first race, and in my opinion, it has several shortcomings. FIRST, it would be a good idea to give users the option to view tire temperatures while watching the race, allowing them to analyze and acquire data on boost levels.
Otherwise, since everything has completely changed, it's like navigating in the dark without data.
Further improvements would include: setting different boost levels for each individual stint based on the tire. Having an assistant (not useless, but useful) that suggests push levels based on temperature and tire choice. Good luck!