I came to know SMALLCREEP'S DAY through the U.S. vinyl version, which has the suite on side 2 and the other 5 songs on side 1. To me, the album wouldn't work nearly as well with the suite on side 1.
I'm also highly fond of "Overnight Job." Another case of different people hearing the same song differently. I guess it makes a better side 1 closer than album closer.