Since Epicurus saw himself as a healer, the Socratic/Platonic turning away from a deeper understanding of nature’s healing processes, would have horrified Epicurus.
I agree and I think "horrified" is in the vicinity of the right emotion. I don't think they considered this to be a mild disagreement to politely gloss over. It goes to the heart of everything, and in analogy to the way Lucretius describes theories that contradict the Epicurean view of the universe,** Socrates' approach opens the way to massive destruction and the Epicureans would have realized that.
**I'll have to look up that reference - can't remember it at the moment but it's something about positing the existence of something besides atom and void.