Those are my fanboyish ratings.

Not a bad album, not great either.
Walking blue heavily hints at Lee's first pop LP that was to come out a year after.
Massage hints at Thurston's last slolo LP too.
The rest is average late SY with a few nice riffs, but a lot less effective and powerful than say NURSE or even half of RR.
As a last LP, it doesn't blow my mind, but it doesn't need to, it's just their last studio album. SYR 9 is a great companion as a last new music release. It's one of the best SYRs too with very inspired and inspiring moments.
I still find it difficult to realize that there won't be any more new Yoof songs....

there will be new old songs, for sure.

My ratings, kinda objective this time, based on what I listen to the most.

Sonic Youth - 3,5
Confusion is Sex - 2,8
Bad Moon Rising - 6,5
Evol - 9
Sister - 9,1
Daydream Nation - 9,2
Goo - 6,5
Dirty - 9,1
Experimental Jet Set, Trash And No Star - 6
Washing Machine - 5,5
A Thousand Leaves - 9,1
NYC Ghosts & Flowers - 8,5
Murray Street - 7,5
Sonic Nurse - 9,2
Rather Ripped - 6,5
The Eternal - 4,5

Yup! For me it's their worst album, production is terrible, I can't listen to it.

well you should try to listen carefully this piece of art...in confusion is next there is the answer to the feeling of final album...(between the lines ;) )

"I maintain that
the band is the future
And beyond it is freedom
Another album is next and Next
after that is the truth
You gotta cultivate of what you need to need
Sonic tooth, sonic tooth, sonic tooth"

Rating by frequency - everything except EJSTANS is in very regular rotation. DN would have gotten a 10 if Eric's Trip didn't completely rub me the wrong way for some reason, my psychiatrists are still out on this issue.

Sonic Youth - 8
Confusion is Sex - 8
Bad Moon Rising - 9
Evol - 10
Sister - 10
Daydream Nation - 9
Goo - 8
Dirty - 8
Experimental Jet Set, Trash And No Star - 7
Washing Machine - 9
A Thousand Leaves - 9
NYC Ghosts & Flowers - 9
Murray Street - 8
Sonic Nurse - 8
Rather Ripped - 9
The Eternal - 8

Dug out the Eternal last night, bloody good record.