I guess I can "sort of" identify with what you are waying in the OP, H, but I don't think that reflects poorly on BCSL for me at all. I typically find myself going through a cycle with DT's material where when a new album comes out, I like it a lot and listen to it incessantly. By the time the next album comes out, I've kind of burned out on it and don't like it as much, but then by the time the next album after that is about ready to come out, it seems like that first album really has its own valuable place in the DT discography and climbs a few rungs. So following that pattern, I've found myself listening to SC a lot more lately and liking it, and not liking BCSL as much.
But one thing I will say about both albums: While I don't see a consistent drop in quality on the Roadrunner albums as a few people would suggest, I see bigger gaps between the songs that are really good and the ones that really don't interest me. I've posted before about how SC is an amazing half or 2/3 of an album. But the stuff I don't care for is really "skipable," and I never really found myself skipping a lot of DT songs before these two albums. Take ITPOE, Forsaken, Constant Motion, A Nightmare To Remember, and The Shattered Fortress together, and you have what I would consider one of the strongest, if not THE strongest collection of DT songs around. And if you really want to throw in some filler, you've got a lot of "okay" songs you can toss in between The Dark Eternal Night, Repentence, A Rite Of Passage, Wither, and The Count of Tuscany. But then you've got songs that I just don't connect with at all and don't care if I ever hear again, and they take up a lot of minutes on the albums so that when you combine them with the more middle of the road songs, the really strong moments just don't seem to shine quite as much.