A couple requests off the top of my head:
-Switch the new bitwise operators (| and &) to something different (e.g. the C++ versions, || and &&) so that old presets that used them don't go fuxery. (And update the expression help to show this.)
-Add a bitwise XOR operator
-Add the ability to save code presets, fruityloops style - have a save button at the bottom of a code construct that puts the code into a seperate folder, under a new extention (.acp or something). Making them universal would be cool, so you could quickly bring up a SSC preset into a DM.
-Add a button at the bottom of the AVS config for docking/undocking (small and inconspicuous and under the config dialogue somewhere). It's kind of cumbersome to have to have to go to the AVS window and click "Dock in config" every time...I miss the double-click shortcut
-Kill the var resetting, like UCD said. It really sucks to be editing your code and have to watch it initialize every time you type something (sometimes upwards of 10 seconds, and I'm on a fast comp...). In place of it, put a "Reset vars (local)" button at the bottom of the dialogue, and a "Reset vars (global)" at the top of the AVS config.
-In movement, calculate the user defined movement when it's selected...and put that "Load as user defined" button at the top somewhere so it doesn't go erasing my movements ._.
-GET RID OF THE FUCKING WINDOW SNAPPING. I have no fucking idea why in the hell you decided to put this in but it's really fucking annoying.
-Add the ability to make your own global vars; something like, to make the variable "bleem" global, put bleem* in init. The regs are useful, but I like being able to remember what variables do from their names