I agree with you vgonis, but BIA was in the chronoligical contunarity, I may say, I mean there wan't a big gap between alchemy and BIA, like it was between BIA and OES. And this gap was full of other contributions/projects, mainly Atkins and Hillbillies which obviously influenced a lot the music on OES, while I wouldn't say that local hero and Cal influenced that much BIA.
it's maybe only psychlogical, but I hear a "gradual" progression from the first album to BIA, while OES appears to be an "outsider" in the disocgraphy, but my point of view is maybe distorted by the release dates I may say.
the resaon is because I discovered DS in 87-88, so I listened a lot to their "entire" discography (at the time), during 88-91 ; and then another album was added, and I always had difficulty to include it really in the collection I listened for years....
to me it feels like the "come back" album, more than the "next" album after BIA