When using RCG's system, I'm always mindful of the fact that what they display online for available flights is NOT the full picture. Several times I've conversed with the RCG air desk and they've been able to come up with better flights at the same prices that were NOT among those listed on their web site. Of course, we only used that service to get better one way Transatlantic prices (which worked).
RCG, being as big as it is, has no doubt contracted for a much larger number of itineraries than SS would have done, and will be able to fold the rather different SS itineraries into their contracts, so it may turn out that the consolidation brings a lot more options to SS customers. One can hope.