Probably unpopular but as a rebuild things need to be looked at from bottom up not top down.
Restore the NL to a competitive league with better standard riders so the riders who move through it are a better quality when they move up.
The other league is Champ Plus. A strengthened version of whats in place now with reserves having to have achieved a certain level at NL. Assessed riders to stay at higher averages 4/5 and Brits to get bigger end of season reductions to encourage use of home grown riders.
Promotors genuinely need to sit together and build teams that are far more equal, there will always be teams that click or don't etc but it cannot be the case that year on year teams are getting bashed at home repeatedly. Its just bad for business on both sides and win at all costs when what's worth winning is questionable anyway is unnecessary.
Build / re-build some rivalries, generate a bit of needle between teams. It can all be theatrics but it adds to the entertainment and gets buy in from fans. When riders, managers and owners are all one big happy family its boring, i want to see some rider passion, a manager stomping to the pit phone to rant at the ref thats all part of a show.