A landing smoothness rating, would be a nice feature. It will allow pilots to get a rating for their landing skills, and this could add a new element to the airlines overview. (Showing the Airlines average landing rating)
One cool thing all pilots would love in addition to this is a Touch Down VS notification which can be intergated if the first part is possible as an additional feature. This is something we all love to measure when landing and would add to the experience using the app in Free play or Airlines/Cargo mode.