No apology necessary. Pointing out and correcting inaccuracies in what was put forth in the original post is part of moving the discussion forward, especially since it seems like the OP was suggesting due to it being an unpopular choice. Regen needs work.
This is my experience as well. Regen is still easily overwhelmed by incoming damage. Recharge rate debuffs are also quite deadly to the set that relies on click heals. I am not sure it really needs any -Regen resistance as it was pointed out earlier that so few enemy NPCs have -Regen in their arsenal. Personally, I think turning IH back into a toggle would make the set play much better in solo situations.
I think you describe the main problem rather well - it is too busy a set.