At least for the time being, while the NFL has been willing to make some modifications to date to its offseason schedule, the only changes made have been as a result of the unresolved situation with the Collective Bargaining Agreement.
Actually, that’s not entirely true, as the Annual League Meeting scheduled for the end of the month was cancelled as well, and they have also banned all in-person pre-draft visits. But the tentpoles of the offseason have not yet been uprooted.
Apparently, though, they were open to, perhaps even wanted to, move back to start of the new league year.