Editing sample-based HS SE presets is current extremely limited. You can only change parameters from the “Macro” and “Sound” tabs, everything else doesn’t work.
The sample-based HS SE presets mostly come from the original Yamaha Motif which for the most part aren’t included with current Yamaha keyboards. It doesn’t make sense to block them off like this when Halion Sonic 3 comes with samples from the Motif XS/XF, which are still “current”.
It would be great if we were given the same level of editability as the Halion Sonic Factory Library. (it would be even better if the original HS SE multisamples could be added to Halion Sonic’s Layer library, but that would just be a nice bonus)