You've mentioned one of them: multi-artist listing. It needs to be relational and open-ended.

The other is better support for tracks that segue into one another. At least now you can manually tell it to rip a mix CD into a single megatrack if you need to, or into a small set of tracks, but it should automatically detect this by checking whether the inter-track gaps are silent or not.

And, even more importantly, when this is done (be it manually or through auto-detection), it should put the audio into a single file so you can listen to it without a glitch between the tracks, but it should remember where the logical track boundaries occur within that file, and present it to you as individual tracks within the UI, so you can listen to pieces individually if you want, shuffle it, and so on.