works well for me, but I can’t speak for one-of-a-kind sample sets. I’m afraid if you can’t get updated versions of your samples you will have to either
a) live with it and move on
b) obtain updates if available.
I can’t speak per the exact issue you may be having but if it is not working now, I would not hold breath for update and just fix the patches yourself and resave. It doesn’t sound like it’s a import issue but a issue because of a 3rd party sampled instrument. I would contact those guys first.
Scarbee does forsure have updates for his instruments.
As far as importing in general, I find Halion import to be only minimally accurate from experience.
If you can, try using Translator latest version to convert to H3 format then import in Halion that way. Those guys update the algo’s quite often to stay current.