I found in career mode the “ATC enforce flight plan” assistance option is permanent-enabled; so that speaks to sticking to a plan instead of adjusting to current conditions (i.e. an hour flight, plenty of time for wind to change from starting plan).
I have noticed if I update the EFB/FMS plan, it gets adjusted in the mission objectives.
I’ve also noticed ATC gave a different approach than EFB/mission guide, and I chose to load/use that procedure, like from runway 23 to 5 - but it was downwind lol - that was a fun landing.