One thing to keep in mind @Black-Square is that the MSFS 2024 EFB is also used to file and update flight plans with ATC. At the moment, this functionality is clashing with the Starship. Even if one fully re-creates a flight plan inside the cockpit and doesn't "send to ATC" or "send to avionics" from the EFB, changes in the ATC following (like requesting or terminating flight following) triggers an update that messes up the in-cockpit flight plan mid flight.
While my personal favourite option would be the ability import flight plans via the MSFS 2024 EFB (I create plans on the web-based MSFS flight planner, then import via the EFB), if that is too much trouble we would at least need the in-cockpit avionics to not break every time there is a change happening while interacting with the AI ATC!
I do enjoy a lot the Starship interface in terms of creating a flight plan, but the EFB is quite convenient to do things like choosing runways based on winds, finding headings between waypoints info or grabbing VOR frequencies.