I also removed the soldered spade lugs and put in Wireworld silver banana plugs. They are a mechanical connection using two allen screws to press the wire against the silver barrel. The micro details seem to be more present and easier to discern during busy music. I was up past 3 am listening to music and am enjoying the new sound very much. I think the banana connection offers more surface contact vs spades and that may help.
I didn't understand this part. Where/on what did you change from "spade lugs" to "Wireworld silver banana plugs"?