Well, the very notion of a “high altitude airway” VFR flight plan should raise questions.
But I guess the problem I’m having is there is no longer a way to plan an IFR flight with standard SID/STAR. Nor specific approaches. There used to be. Such things are typically needed in IFR flight.
Thus, I am alarmed inasmuch as all I fly is IFR, and I (used to) use the setup page to do so. So yes, I would and do characterize the present inability to set up an IFR flight as both a “hot mess” and a “dumpster fire” in that it means the sim, given my expectations based on previously reliable performance for me, is now unplayable.