I like it but I notice a few things
You cant really get that key click dirty sound that some really good B3's have
second The percussion is kind of weak on the new b3 its touch sensitive which is really strange on an organ
Now for a church application, a vintage organ in immaculate shape and a Leslie is the best way to go because the New B3 is way overpriced, and you can get a great vintage organ and Leslie for less than you can get a new one.
What I like about the new sound engine that is in the New B3, is that those parameters that you don't want to go into allow you to get a dirtier key click sound, or adjust the percussion sound to your liking, as well as other characteristics.
This is a major development because as we all know, no 2 vintage B3s sound alike. But they have gone and programmed the new one so that you can modify the characteristics of the sound so that it is way more flexilble in getting the sound one is looking for.
This was always my beef with the XB3, you were stuck with what you got, and all of them are exactly the same.
This is coming from someone who has two 1960s C3 organs(I'm not a rich man, the Lord blessed me).
For me, I'm always moving my rig around, so I'm more excited about the XK3. It shares the same sound engine as the New B3.