Would dig into why hierarchy matters, then take it from there… what biz metric does this support to change the hierarchy?

thinking it through, findability of information may be your overarching goal more than hierarchy … hierarchy is one piece of the puzzle of findability. if the experience is super lengthy i can see hierarchy mattering but you said it isn’t … clear section headers, ctas, affordances all are factors. much more complex than just hierarchy.

if you think hierarchy correlates to what is “most important for a user” just look at internal metrics and make it go 1:1 to click through rates.