After reading up on some of the modules, I've created another iteration:
Most notably is that I've taken out the Metron sequencer and Mutant Clap, swapped out the Performance Mixer for Cosmix Pro, re-added the Scrooge, and added Scrat and Messor.
The Numeric Repetitor and Traffic (thanks for the suggestion, looks really interesting) will help with rhythm generation. Scrooge can help with sequencing as well (I've added a 4hp blank panel as stand-in for Della next to it), and of course Pam's can help with sequencing as well. The Numeric Repetitor is a module I already own, and I'm glad that it found it's place into this rack. I think it could be a very interesting module to combine with Traffic and DPLPG.
Cosmix Pro "only" has six channels (and only two are stereo), so I had to take out one of the drums. Mutant Clap was the one that I was least interested in, but it "solved" a problem I had: I really want Mutant Hihats, and it's 13hp... those odd numbered modules can be frustrating =P So when I discovered Scrat, which is 9hp, it solved that problem, in addition to sounding really awesome. It might be awkward to have two filters, but I think Steve's and Scrat both bring enough to the table. Also, I agree that the clap can be handled by Rample, so out it went.
And again, thanks for suggesting the Messor, I think it will work very nicely as a glue compressor for the whole rack ^_^