Hmmm... Whether to continue struggling along with one release method, desperately trying to improve and meeting with limited success, or touse another method which works well for you right now. I'd have to ponder that for a half-second or so before saying something equivalent to.... DUH! [8D]
I started using 3-under many years ago, shooting barebow with my compounds. It makes for a very smooth release. I also began using it for my traditional bows when arthritis started getting into my fingers. It does spread the load more evenly across all three fingers, makingshooting a lot more comfortable for someone dealing with old-timers disease.
The only reason not to go 3-under is for tournament shooting. There are still somearchery clubs who continue to insist that split finger is the only legal release method for their tournaments (Texas State Longbow Assn, for one), but the number of them is dwindling fast. Most places don't care how you release, just as long as one finger is always in contact with the nock - that's toeliminate string walking.
But that's just tournament rules. Tournament rules don't apply to hunting or just having a good time shooting a bow. Do what works and feels right andmakes shooting more enjoyable for you.