So how can a great system solve less than great recordings

For me, the saddest part was when I realized that "older recordings" in the OP meant 70's and 80's. My first scan had me thinking that 70's and 80's were fine, but "older" recordings not so much. I guess "older" is relative.

next i will buyout comcast

Nice! Let us know when you do!

Without having to change components, cables are often used to balance the highly-resolving-system vs. poor-recording dilemma.

Although many people are using cables to realize the full potential of their equipment, they are often used to find a balance. Hopefully this simple statement won't start a cable-war dialog; not intending that!

Before I get chewed out for my cable comment, I will acknowledge that many people avoid some of the higher-resolving brands due to this issue, or are careful how they pair electronics and speakers where one or more components are highly resolving. If this doesn't work to the degree desired, then making adjustments with cables is one way to go. I don't see this as a tone control; more of a fidelity control (musical/resolving balance).

OP, you mentioned "album" but didn't clearly state whether your poorer recordings are on vinyl, CD, or streaming (unless I missed it).

I believe there are threads here related to finding better versions when streaming, as a means of avoiding the poorer recordings/productions/CD transfers.

I stumbled upon some interesting info recently, related to record producer Rick Rubin, criticized for recording (producing?) techniques. See "Production Style" near the end of his wikipedia page. What a shame to waste a good recording opportunity on poor-outcome recording/production methods.

@jumia,

Poorer older quality cooms from a qobuz stream.  
Is older stuff handled well by qobuz?

I'm not a streamer, so can't help on this.

That's an entirely different subject (new thread?), in terms of streaming services, high-res vs. xxx, and the real issue you're looking for... finding and identifying good digital source material. Different mastering, alternate recordings, and which content providers have more variety and higher-quality material. Must be lots of info on this forum, including some recent threads I believe.