A first for me

no, get a natural click from the band performance.

you'd be suprised that some bands have this really cool way of slightly changing the tempo in and out of fills or in and out of choruses.

sometimes its really useful, something you wouldnt normally think of but sounds awesome

Yeah, I figured that, but PhilR mentioned using this new click to re-record drums, which seemed kind of odd to me - why would the same drummer re-record them if not to get it more in line with a steady unchanging click?
 
Yeah, I figured that, but PhilR mentioned using this new click to re-record drums, which seemed kind of odd to me - why would the same drummer re-record them if not to get it more in line with a steady unchanging click?

well it becomes a little different

say the verse is steady but the chorus is speeding up and slowing down
when you make the tempo for the chorus you don't copy this behavior

the run back through with the drums will cause the drummer to chill out during that part of the song...

there's other shit you round off and clean up too, it just depends.