On BMS and HK...
I have said it before, but HK is one of my favorite DT instrumentals, and BMS is one of my least favorite songs on FII soooo...to me the "extraction" of the instrumental portion was perhaps the best production decision in those sessions. And I did hear the original version first, live, on the Pre-FII tour.
And going over Scotty's examples...Metropolis, well, yes, the instrumental section is a bit out of nowhere, but the young me in 1992 hadn't heard anything like it, so I fell in love with it regardless
As for BTL and TDEN...they are pretty far down my DT songs' ranking, so I guess it all more or less fits...