Whilst i very much agree its hard to argue that more opportunities at a development level creates bigger competition in league speedway. Quick scan of 2015 shows 10 teams and 70ish riders. Around half of those went on to rider NL and several higher (some were already NL at the time).
It certainly shouldn't be league places for all but it should be a case that those with enough ability can showcase their talents in the MDL/NJL and if they are fortunate to get opportunities from there so be it.
The MDL was shrunk down to pointless numbers, those competing lost interest, for any starting out its hardly an inviting option leaving the majority of newcomers being the cream of youth rounds whilst the rest get discarded.
The NJL is great with the focus on current and next generations but then fails to offer variety of racing across a night.
The solution is to get a lot of kids into speedway, supply plenty of opportunities to get on track and learn how to race and hope from there BUT certainly easier sad than done.