Is end of HS junior year the new deadline for getting college application materials ready?

Exactly! Same at our school and the other ones I know well(private): everything on the OP’s list is encouraged to be done by the end of junior year, OR a plan for over the summer before senior year. It is not new here–at least 3 yrs old, but I do not know further back. Tours were harder to do as early as the school suggests (summer before junior and during junior)with the 2023s, but the pre-senior summer used to be meant to be for filling out the list or making the ED/REA decision, not the bulk of tours. This year many of us were “behind” due to schools not being open for real tours until late spring 2023. Even with the common app essay essentially done since early in the summer, there is still so much work for D23 for all of the scholarships and supplemental essays; it seems never-ending at this point!