While there is something to like about the short notes, it seems to me for the sake of playability the sampe starts have been cut to early. I surely like to have a short patch as playable as Synchron, but when it comes at the price of getting unrealistic results, I would prefer a less playble one (or rather an option to switch between playable and good sounding, like other libraries offer without the need of loading an entirely new set of samples into ram).
I understand your point and sure, it is nice to have a little more natural attack. However, coming from using several other major string libraries, I have to disagree in general. Inconsistent shorts (attacks, levels, and even lengths) is frustratingly time-consuming in some other libraries - the best/most used libraries, not the inexpensive smaller libs. Round robins that vary 3-6db in volume made some patches in my main string library unusable. Inconsistent short attacks frequently require extensive editing to a cue to fix poor timing, and some patches, again, are completely unusable because those attacks aren't consistent from layer to layer, note to note.
I am new to VSL libraries (having used VEPro for years, but never their libraries), and I can say without a doubt the accuracy is going to save a lot of time with mockups. The shorts have already replaced another library in the cue I am working on at the moment.
As far as legato complaints, there always seem to be tradeoffs. The best library I have, and have used for easily playable legatos suffers from too much slur. So, while they sound great sometimes (if not overly romantic most of the time), they have to be dialed back or note-to-note transitions edited to avoid the legato transition altogether. Synchron will require a different approach I think, but I am already hoping to see legatos in Violins 2 and Violas in some update (Synchron 2?).
Personally, I am quite happy with Synchron Strings 1 as a solid starting point for the series. It is an excellent string library, and I don't get paid to say so.