Yeah, I’m hearing pretty much the same thing. I hear the snare drum sound in that. At times, I agree it sounds like a snare with the snares turned off (or barely touching the snare head), and at other times I hear that “pop” sound similar to a bad flam being played. But all of it to me is a snare drum sound.
I think this is due to the quality of the snare sound sample in Halion. Unfortunately, I am not sure if there is much you can you can do. I think the one sample is covering all instances of the instruments and it perhaps chokes up at times. I am not deeply into the playback part, but to my ears I hear a snare drum, sometimes a snare drum with little snare sound, and a ton of “popping” flams.
I know this isn’t much of a help, nor any answers. But I think this goes back to the humanization aspect of Dorico and the quality of the sound sample from Halion.