500 style modules for Mic preamps and EQs seem sensible to me, but figuring out a "tight" mechanical packaging for those is a challenge. 12 times 1.5" width only comes to 18", versus a standard 19" rack width. Then it becomes a matter of packaging design so it "looks correct" if there are many modules all lined up from left to right in the console frame vs a bunch of 19" buckets side by side.
When I was a "baby" in the early 1970's I cut my teeth on MCI 400 series inline desks and 16 (later 24) track tape recorders. While having to submix things like some drum mics was a given, I realized that most everything was "one mic to one track". So when I designed and built my desk (actually two were built) I decided on 8 tracking buses with a simple switching solution to "automagically" send a direct out to a tape track. My ramblings on that critter....many functions were a "MCI 400 on some steroids"...are here:
http://www.brianroth.com/projects/m77/m77.html
That was then, this is now. I have some thoughts about features gleaned from many more years from sitting behind a desk. In no particular order:
1. Stereo solo...non destructive.
2. I don't know what to call this solo function. Adjustable level for the "main stereo mix as it sits behind the stereo solo bus as you listen." Gives some context as you solo.
3. LOTS of CR speaker source selections. I liked Neve's "Internal/External" switching concept.
4. More than two speaker choices for control room listening. Main/alt...not enough.
5. Although individual headphone mixer units for each musician are popular, they can be a headache. I've worked in studios with "hearback" and other systems, and I spent a lot of time out in the tracking room with headphones on as I de-fuc!ed whatever the guy/gal had done with their individual "mixer" unit. So, a function that allows the CR monitor mix to be sent to cue feeds, with "more me" control via aux sends at the desk. That ASSumes the session engineer does a decent mix to start with! Four stereo cue outs derived from the CR monitor mix with the "more me" via aux sends seems to handle even large live band tracking sessions and prima dona (sp??) players.
6. Ability to feed a pair of speakers in the tracking room so the folks can take off their headcans to hear playback of a take. That needs to be independent from whatever also needs to be heard in the CR...."I wanna hear what track might have an unwanted buzz" without disturbing the playback in the tracking room.
7. In the CR, switching to mute left or right speakers with a mono option. YES...mono because so much music is heard in essentially mono...Iphones, etc sitting a few feet away from the listener, cheap TV sets, etc.
It's late so I won't expound about inline vs. split monitoring. I grew up with inline, then "met my match" with the complexities of an inline Amek 9098i desk...I ended up routing/patching that desk into a split to be able to work.
Bri