Hmmm ! I hear you, Dave, but surely no-one would listen to their speakers or cans with hearing aids in. The hearing in my right ear was identified as 40% down two years ago (it fluctuates and is sometimes lower, I feel) I get no imbalance on my system and there's no balance control anyway ! I am pleasantly surprised by this, but find it hard to just put it down to having ESLs.
To me, hifi/listening to music is the very last use for hearing aids, not least that I doubt they can equate to the quality and frequency delivery of a decent hifi rig. They certainly can't augment these. I was referred last June, but haven't gone ahead yet. People I play racquet sports with are used to me being Mutt & Jeff, but there will come a time.....