The issue that i see with that is SL doesn't have the talent to spread across 24 clubs to keep things somewhat even. Either the gap between top and bottom would become excessive or the talent will be diluted to a level of mediocrity, leading to a weaker national team due to a lack of exposure to opposition talent at club level.
I'd go as far as culling the leagues to a 10 or even 8 team competition with standard promotion/relegation and the top 4 playing off to be champions.
All the Super 8 idea does is drag the season out unnecessarily, leaving people to grow bored of the product at around the time that the EPL kicks off and has the most excitement around it.
I have long said cutting the top 2 tiers to 10 teams each with P&R would have a much better balance. the shortfall in games on the current format can be made up by a Scottish style single round robin league split (18 + 4 + playoffs + GF) and an additional group round robin into knockout tournament for the top 20 clubs. licensing into the top 20 would be strictly Controlled on financial, development and stadia criteria with the goal of all 20 being full time professional. league one remains the entry league and formatted accordingly, perhaps split into multiple leagues/levels itself.
20 teams could be, in an ideal world
-Leeds, Bradford, hull fc, hull kr, Huddersfield, Halifax, castleford, Wakefield
-Wigan, Widnes, wire, saints, Leigh, Salford
-London, Newcastle, Toronto, Toulouse, catalans, welsh side
Basically it's expanding on the idea of when we had the period of licensing with the 14 teams.