Much as there is a fundamental flaw in the current system, which rewards/punishes clubs for stinging a few good results together at the end of the season, the 3 x 8 structure does liven up the end of the regular season. Back in the day, clubs at the lower end of the table could just go through the motions.
However, IF the idea behind expanding SL is to include Toronto and Toulouse, then promotion and relegation could be the death of either or both of them and whilst many would say "so what", there is little point in changing the structure (again) to a system that wouldn't achieve its objectives.
We have to remember, RL is less about sport and all about the money and do we really think the current SL CEO's are bothered about the game as a whole or, will they be more concerned with their own clubs' future's.