I wasn’t looking at it from the session drummer (Chris/Omar) perspective. More from Terry’s. Rehearsals being where the songs were worked on, developed, speed, arrangements etc. I’m going to hazard a guess that Terry had a little more input or involvement in the whole process than a Linn drum.
We’ve been talking about how Pick seemed to have skills that added to the arranging of songs. The drummer can try all sorts of different things, quickly. If things are tried that don’t work out, it’s surely better to find out before the studio. It’s still part of getting the songs from A to Z, or A to wherever and then Omar finished at the Z maybe. I like to think Terry was still part of that development process - and I know that can all be considered guesswork, but I’m not sure that the songs and instrumentation just came out of Marks head fully formed on day one of rehearsals, maybe Mark also chose from what he was getting as the producer/creative director type.
I just had always thought that replacing the drums was only done in really drastic problematic situations as a very last resort, which Chris’ posts have opened my eyes to, as I didn’t know it was also common practice to even get another drummer to see if they worked better. I guess that's why I saw it as a last resort, and was compounded for me by the fact that they wiped Terry’s tracks, which I always presumed must have been a high risk thing to do in the tape days. Ok, so nothing was planned but they still knew they had that as an option.
However, at least I now feel Pick left at exactly the right time. For me, those first four albums have a really nice arc to them, in terms of Pick’s incredible work.