I can't see three teams being relegated in 2014. More likely that the teams at the lower end of the top division of eight will, once their chances of finishing in the top four have disappeared, be moved into a separate division of eight with Toulouse and the three teams at the top of the middle division who are safe from finishing in the bottom four of that division. These teams then play each other home and away, with Toulouse playing more of their matches at home than away. The top three of this division will then rejoin the surviving five of the middle division to form the actual middle division, with the final top four being guaranteed a place in SL for the following season.
I think this straightforward structure is more in keeping with the desire to keep matches 'meaningful' and yet, at the same time, be innovative.