Here's what I'm betting didn't get put into X2 that I DEFINITELY want (though if somebody who pre-ordered could confirm any of this made the cut, that would be AWESOME):
-- Pro Channel implementation that works with the Mackie MCU/C4 such that I can navigate the PC modules using the controller.
-- Scalable and Customizable Skylight interface, particularly with the Control Bar. I'm working with limited screen real estate, so space is at a premium. I don't want my buttons to be so large, nor do I want them so widely spaced apart. I also would rather have a tight group of buttons for all tools (akin to the Screen Sets or Markers displays) than have to make a secondary click to access tools from a drop-down menu. The Smart Tool improvements look good, but sometimes I want discrete tools to avoid accidentally doing the wrong thing.
-- If the CB can't be scaled or the modules customized, then I'd want a way to access "hidden" modules reliably and easily (pagination is preferred, but scrollable CB or tabs would work too).
-- All MSR buttons (Mute, Solo, Record, Polarity, Interleave, Read/Write Automation) available in Narrow Console Strips again.
-- Less bulky knobs/sliders for Input Trim and Panning in Narrow Console Strips. Also, access to pan controls for Aux Sends in Narrow Strips.
-- Scrollable Inspector Window. Again, my screen is smaller than what Sklight seems to be designed for.
-- Detachable/Floatable PC module windows. This might be messier if you leave your windows open (which I normally don't), but the option would be nice so the user could choose how to view PC modules for themselves.
-- Open-ended Autopunch (i.e., you can punch-in, but don't need to specify a punch-out time for it).
-- Friendly Names that permit us to customize every distinct Mono Channel AS WELL as stereo pairs or surround groupings. Ideally, we could create our own customized groupings of channels and also order their presentation in the Input/Output Dialogs within Sonar, too.
-- Temporary on/off toggles for Groups (both edit groups and mix parameter groups). Ideally, we could also put tracks and/or mix parameters into multiple "stacking" groups and set up a hiearchy for those groups, so we can control which group is given priority over others.
I do like the look of the Automation Modes (hooray!), the new Now Time, Smart Grid, Auto-Zoom in Track View, and FX in the Pro Channel (though that raises some interesting philosophical questions about the Pro Channel).