I don't think this can be overstated. Especially with the limited practice time, offensive simplicity has become a major "best practice" in CFB these days (along with optionality, pace, spacing, and having a qb run threat available).
And being great at your core offensive concepts is critical. There is now this memetic trend among some coaches to talk about "being multiple" when all the research indicates this leads to being mediocre at a lot of things and great at nothing. Chaney has the right ideas here imo.