Here are my impressions on Hyperion. I've been using them for more than 50 hours.
Hyperion is definitely a bass cannon IEM, too much bass that is fun to listen even for me who likes more mid-oriented and analytical sound. They are very good indeed. It is the treble that hurts the overall sound a bit. It sounds artifical with stock tips however comply foams take the edge on the treble and tames the bass significantly. I've found that the complies are must for the Hyperion since they can be stretchy and too bass and treble focused a typical "V" sound signature with stock tips.
About the tootpick mod they did make a significant difference. They bring back the mids more forward and clean up the mids which was a bit muffled and recessed and not detailed before. They somehow corrected the overall sound. I have to admit that I was not fond of their sound before I gave my toothpick a chance
I have some other mods I want to try but Bob has done a great work in making an indestructible IEM.
Maybe adding some foam behind the driver as there is nothing behind the driver would make them better.
Do I like them? Yes. Are they better than my MK5 or IM50? No, but they are great when I need some fun and excitement when on the go.