For Scott, the first person he's going to look out for and protect will always be the Professor. Even Jean is aware that the Professor tends to come first and they have bickered over it! That part hasn't changed. What has changed is that Scott feels completely left out of the Professor's life and doesn't know what to do about it. Because the Professor leans on him! Scott does the work, Scott helps to run the mansion, Scott's the one with the responsibility and now, while he is busy with the mutants, he hasn't heard any requests/orders from the Professor and that makes him feel lost and antsy. He feels he lacks a place with the Professor, something he's always taken for granted.

UHHH SoTU for Tatsumi.