Oh yeah, the possible use of delay/echo didn't come to my mind at all. It's kind of rare to put something like that on the bass drum I guess, not talking about kit reverb though.
I know that the Rockfield Monitors are just the raw mixes from the sessions, and it's very interesting to hear all the things that were left out from the final versions of the songs. Parts of YS666 and I Love You were cut out, I'd never have noticed the percussion in Wicked Game, Poison Girl originally had a longer intro, the acoustic guitar tracks on Heaven Tonight are buried on the album, no fade out in RHIMA etc.