I know this is a rather old thread but I would like to share my thoughts, too.
First, I agree with all peers here that it is a true shame VSL abandoned the VI sampler.
However: I understand the decision from VSL's perspective. Yet, in my opinion, it was poorly executed. Let me tell you why, I hope (even though it may be futile) to inspire future considerations regarding synchron player updates. Perhaps I will end up using Synchron, which refuse atm, even though I bought libraries for it 😉
I met Herb Tucmandl in 2008 in Ebreichsdorf, where the original "Silent Stage" was located, to interview him for my diploma, My topic was "microphone techniques for recording strings" At that time, there was no other company that could reach VSL's level of sampling quality (I still think that's true in 2025. Right now I am composing a piece of film music and the sound of the old VI-libraries, running through a high end reverb is just phenomenal.
Together with the samples themselves, the VI-sampler was unbeatable. On one page you could find every option to tweak the samples, stack samples, blend samples, in a way you could have ver dreamt of. On the second page you had that sequencer where you could trigger different cells and create ready-to-use phrases without the need of using keyswitches (I don't like them). That is what made the VI (Pro) sampler so special, without wasting screen space.
I get it, the trend says give'em multiple mics. They are all doing it. (in fact, that is the only reason I can see to create a new sampler.) However, the truth, even though a possibly unpopular one, is that most composers are distracted by the possibilities you give them, implying they would have to use the possibilities just because they are THERE. Make it sound good out of the box, and let the composer focus on creating music! That is what the VI-Sampler and the VI-libraries were focused on, as processing power wasn't available at the same level as it is today. (That is why Vienna Ensemble was invented.) The libraries, in combination with the MIRx-extensions, delivered perfectly.
Now, how would it have been possible to keep all the functionality of VI Pro while adding the option to tweak the mic mix? Oh dear, sooo easy. You have that mixer in VI-Pro, one channel for each slot, do you remember? And what could have been easier than creating a mulitple mic library from which the user could then drag the needed mic samples into another slot? Just imagine the creative possibilities you would have by doing it that way! Not only could you add dry, AB and Decca, you could also mix the dry samples from a Celesta and mix it with the AB samples from a harp...
All it took was to create additional mic libraries, and perhaps to code in an output selection to the mixer, overhaul the GUI to give it a modern look, done. The synchron player, to be honest, is a step down.