I think that with so many teams having such dramatically different fortunes, it seemed to me like the operating range was very tricky to get to, certainly at the start of the season, and hitting the sweet spot may have been down to good set up, but may have been getting it right by chance, at the right time, on the right track. Mercedes were not great at Malaysia, and suffered with massive tyre issues, which seemed to disappear by China.
My personal thought would be "So what" surely it is the same for everyone, and being a team sport, it is situations like these that lead the technical bods to earn their money.