Well, hard to say if your relief was related to pressure. Without more input that suggests otherwise, my guess would be your relief was more of a nerve thing.
Having the metal clips, scarring, granuloma, crap, etc, etc removed may have been what helped. I'm personally not a believer in converting to open ended. Some say it works, but I believe, in many cases, it just leads to more problems down the road, such as leaking sperm.
I've never read a story where epididymectomy made a man all better. Do a search on the massive internet for men made better by that procedure. I bet you find far more horror stories than compete resolution stories. I can't remember a complete resolution story off the top of my head.
Personally, I would give reversal a try any day vs the other idea. It's unfortunate you didn't do that first IMO.
Other ideas I would "consider", give it several more years to resolve itself, or perhaps Dr P de-nervation.