It all stems from not enough riders, especially good riders in the Premiership, mugged away the chance back in the Elite/Sky days. If you had a stand alone Premiership with top line riders, without the doubling up of so many and only a few of the heat leaders from the championship in the Premiership it wouldn't be the problem, and you'd have natural progression from NL to championship with closer racing and progression of the ones to make it, or be competitive in the championship.
Unfortunately through bad management/promotion of the product, those days have gone....shame, not enough teams left to do it now and the problems Poland have caused with race nights means almost no way back.