@zlone "...Keep in mind that I have used several sets of interconnects with this system already, and there was no issue with leanness."
Had a full loom of "great" cables like this once. It did not start out this way, but seemed to become increasingly "less engaging" of a sound as I added more of the exact same type of cable throuhout the entire system. Tonal balance was lost.
Yes, letting the cables and dielectric relax and settle inside of each cable 200+ hours did help and sound did change some for the better, but that leanness you refer to was still kinda there. Did not really go away. It was simply not a great match for my amp and preamplifier at the time was the final conclusion. Took a while to admit this and back out of it all - to literally start over from scratch. Went back to a baseline. Others have suggested that familiar "baseline". Then I read the statement you posed above.
Sure, give it more time. If that does not work, go back to the entire set of those former/familiar cables and listen for 2 weeks. You’ll find your answer with no more advice from anyone here needed. Hopefully you kept a few of those old cables around to re-test. Exactly the reason I don't immediately resell former cables.
Sometimes pairing up an amplifier known for that added "clarity" and "detail" with a set of cables known for the same characteristics can give you exactly that as.a result. I’ve found some combinations of expensive cables can simply tilt too far in a direction you now hear as no longer being "engaging". This can happen.