For what it's worth, I finally had some time with the coils that came with the Brunhilde MTL RTA (1 ohm 26ga Ni80 that I cut down to 0.7 ohms). I like it far better than the thick kanthal I had in her, cleaner and richer, though taste is personal preference and all that. Not getting any off flavors or metallic notes with these coils. Did you notice any?
Come to think of it, at the risk of providing (more) unwanted cleaning advice, if your atty has been heavily used, a deep clean might make it taste better. I noticed after ~2 months of daily use I was getting off flavors (including a metallic taste) that persisted after simple rinsings with hot water, but a deep clean did the trick (i.e., full breakdown, everything but steel wires cleaned in water and Dawn, then at minimum spot cleaned w/ grain alcohol).