What are the mistakes in your opinion? Relegating Us (Liverpool)?
Over the years? I felt relegation was introduced too soon, I didn't (and still don't) see the logic in having clubs take backward steps through relegation while the league is still trying to take forward steps. There were times when the league was not at the optimal number of clubs but rather than keep promoting into the league until that number was reached, there were clubs dropping divisions to a lower standard of operation to start their work all over again. Take Everton for example. They were relegated at a time when it wasn't necessary. It set them back. It set the league back to lose a club of their standing. It even set us back, the Merseyside Derby has never recovered.
The general make-up of the divisions has been off; they have been too imbalanced, had too many in one and not enough in another. They've had the cut-offs in the wrong place; leaving clear divide in the middle of a table because teams should have been in a different division, which in turn made promotion/relegation even harder to contend with. They've had odd numbers of clubs (the Championship is currently at 11).
The scheduling of the leagues hasn't been right; they've ran at the wrong times of the year throwing up all kinds of clashes with UEFA's and FIFA's schedules. The fixture lists have been stop/start with gaping holes everywhere.
And yes. I believe relegating us is a mistake. As is not increasing the number of clubs in the WSL. And levelling up the Championship to 12 clubs. Things have always operated on a licence basis and the FA have had no problem resetting the licences whenever they thought it suitable. This was the perfect time for a reset of sorts, it would have been more justifiable than many of the past times. But they've chosen to do something else entirely.