Without any doubt in my mind, 100%.
If HBO and the creative team wanted to continue with the show, they’d do so with different showrunners. This is exactly what happened with several HBO shows, including Veep recently. The availability of an opening at Lucasfilm didn’t have any bearing with what HBO was planning.
Believe it or not, Disney isn’t so powerful that other corporations make drastic changes with likely harmful financial implications to their most profitable properties just to accommodate them.