the comments made by Adri and also on the german forum made me take a closer look at the issues mentioned. Unfortunately these have not been brought up by my beta-testers, who obviously didn't judge them to be servere. I'll address your points below:
the staccato releases just do not sound right; quickly repeated chords sound very strange, hollow, acoustically off the mark, and release-wise it's just not right. You just can't play fast repeated chords or staccato music. The double (why not triple,as is the norm nowadays?) releases can't handle it.
There are in fact three release layers for all stops, staccato, portato and regular. However I noticed that the parameters for the staccato releases leave some room for improvement. At the moment I am experimenting wth different settings, and quite some improvement seems possible here.
the organ's volume is not set right; some stops are hardly audible
The voicing has been done by Hans-Peter Reiners, the long term titulaire of the original organ. This is however a very personal judgement and also the organ may sound different depending on the audio setup. Please send me a note which stops you find hardly audible, as of course errors may have slipped into this as well. It is however something that a user can fix easily.
the microphone placement seems too close to the organ; the reverberation is a hardly audible distant sounding after-effect; it doesn't sound quite natural
It was deliberately recorded fairly (but not extremely) close and not in the middle of the church to get a good direct sound of the organ with clear speech. Unfortunately (I did not make the recordings myself, but licenced them from Peter Ewers) the recording position for the Positif is in fact very close. However, keep in mind that we are not talking french cathedral here, but a building of a much smaller scale, so you don't have a Notre-Dame like acoustic in the first place. Also, the Positif is placed on the balcony, while the rest of the organ is way back on the tower wall. Hence the Positif of the real organ also does sound more direct.
the organ sounds unbalanced between reeds and flues.
Again this is the way that Herr Reiners regulated it, and so I believe it is the way the real organ is balanced.
I am working on fixing the release issue, I also am working on improving the denoising in the attack phase of mainly the flue stops (I found that a small change in my denoising algorithm may get a substantial improvement there as well). I will revisit the voicing, but I do want the sampleset to reflect the original instrument as much as possible. If errors slipped in I will happily correct those.
Hopefully within a few days I will be able to update the files on the server with an improved version.
Best regards
Reiner