I like the theory behind this idea - a newly promoted team shouldn't be expected to push for the title win straight away. However, ranking teams according to their team strength is probably a logistical nightmare at the moment, with some teams inside focused and some outside focused (see EBBL for the last couple of seasons - championship finals).
I like the fan survey though, I think it works incredibly well at the moment considering it's only been here just over a season. Perhaps this further idea suggested above is a slow burner for the future?