The "hh" sound in easy onset is supposed to be a voiceless sound, so not really an added sound. I think the idea is really to get people to speak on the exhale. At least that's what I was taught, but I honestly don't know if it's any good. Speech therapy has never done me any lasting good regardless of the effort I put into working on all the techniques. Sounds like you're almost the only person on this sub who's gotten anything but crap speech therapy lol.