It seems to me that VSL-Libraries are always one step beyond in their development than their player, as the synchron-player seems to be the ultimate player engine to use the dimension-libraries, than regarding the content of Synchron FX-Strings I would suggest: what you need now is kind of a hybridasation of Synchon-Player and NI-Reaktor (like the UVI-Falcon for instance) to allow the most flexible controle of the wealth soundscapes which VSL opens for Orchestral-Samples like the Synchron FX-Strings.
(Sorry, but I cant resist asking for "the" next step again and again 😛)