Wait what? Improved? Not for me. I don't see any changes, it still lagging, loading, resuming etc. Take a look at my video. This is my Xbox Music app running latest update. It's not any faster than it was is beginning.
Maybe you guys who use phones with 1 GB of ram can see some changes, but the majority of us using 512 MB of ram still see Sh!T.
Don't conflate "not good enough" with "zero improvement". That's a false analogy.
Your list of complaints is valid, and yet, so are the following which we've now seen supported, it seems.
Improvement: GUI--closer to Music + Video. Unless you like the change to Xbox Music, this is a plus. This has been a long, gradual process, bringing back artist backgrounds, etc.
Improvement: Performance. Still needs work, but it's way faster than the beta. No ignoring that. 3 is still greater than 1, even if it is smaller than the 10 we're all hoping for.
Improvement: MPATool support. Totally undeniable, because MPATool is awesome (and coincidentally, absolutely necessary on the
old Music + Video App--i.e. the good one needed it to)
You are absolutely entitled to your opinion--exactly the same amount anyone else is entitled to theirs. You're also entitled to want more (I'm still waiting for LiveTiles to be added). Furthermore, these changes aren't limited to 1 GB phones--my neighbor, with a Lumia 720, is my primary reference point (512 mb), so that may be a problem with your phone in particular.
Could it better? It certainly could. Has it improved? Yes, enormously. Don't forget, Music + Video had problems too (for example, linking to the music store database, which is easier to do with Xbox Music, for all of its problems). At least one of those has been addressed, and I'm certainly hoping more are on the table as well. In the end, Xbox Music is unfinished, and merely as good as the rather poor music players on Android and iOS--hopefully, now that Microsoft seems to be taking the problems seriously, they'll make one that's as good as Music + Video was (or close to it), while maintaining the functions that Music + Video didn't have but this one does.