Could you mention why the dimensions did not do the job for your needs? Was complexity the problem or that this ensemble does not sound rich/big enough for some compositions?
I ended up with using the Dimension in a 2 desks setup. I sometimes layered them upon another library to get some precision in fast lines i.e. I didn't work and search a lot within Dim so my opinion might be uncomplete but I didn't get large legatos sounding as I expected. And the major issue to me was the lack of 2nd violins, I had to use this boring transposition trick by 1 tone.
It feel like Synchron are way beyond Dimension (sound and playability) but when I have some time to I'll have a deeper look back on Dimension ;-)