Do you think Ayu is improving on some songs?

[auss246]

I think the title sounds a bit vague, but I couldn't think of anything else! I just watched Ayu singing A Song For XX at both a'nation 08 and 09.. I think with her deepening voice, that song is so much better now than it was before (even though she did sound good years ago!). Does anyone else feel this way? Feel free to contribute other songs that you think, given her dramatic vocal changes, have only improved since?
Sorry if this has already been discussed before!