I'd remix most of X&Y- strip them down a bit and add more acoustic and organic elements. Especially the Hardest Part. It really shines when there's less going on in it so that the underlying chords carry it.

 

I agree with that. The whole album needs to be remastered.

 

I also would cut out the intro and the "arabic" sounding pieces in Yes. And I would have left Life in technicolor without vocals, I love Chris' voice but the song is just such a great instrumental.

I'd definitely remove all the echoing wind / voices stuff from the background of Easy to Please and replace it with... I don't know, maybe some gentle bass, maybe nothing.

 

The wind and voices drive me CRAZY!