Okay, I finally decided to buy the synchron-ized Appassionata Strings...
My verdict: Awesome! Enhanced legato (I never liked the original ones), enhanced vibrato. And the EQ is exactly my "hollywood" taste. Perfect (!) companion to LASS. No EQ-matching needed. VSL, you did a great job! :)
But I've have to say that I'm missing the humanize features of VI Pro. Especially for faster passages and runs where I could make (subtle) intonation blurs. Pity also that the "slur" patches from the original one are not available, they also helped for runs. And, of course, where are the con sordinos?
But again: I never thought it, but I really, really like this re-editing. I'm angry now that I didn't buy the Chamber Strings for the reduced price.
EDIT:
My opinion on the legatos: I always increase the release slider in VI Pro to make the legatos smoother, and then the old ones are nearly identical to the new ones. Maybe it's imagination, but I like the new ones better, they sound a bit different.
For me, even the "strong" vibrato patches sound stronger than the old ones, which I really like.
The EQ preset and the convolution module helps also in the sound. Of course, you can say that you can achieve it with MIR Pro, I tried it, I can't achieve the same sonic impression (maybe due to my lacking mixing skills). Still waiting for the MIRx presets for Synchron Stage, hoping they will be released soon. I also think, but don't know, that besides the EQ there is some re-mastering applied. Playing chords or polyphonic legato with new ones sound "clearer" or "modern", with old ones more "darker" or "vintage". Just my impression! I prefer the new ones.
But it's always a matter of taste...