To take the 11r from a good device to an all round great studio and live tool, I see these as the major necessary additions.
1. Global EQ (parametric) for monitoring solutions.
2. 2 way MIDI communication to allow full use of control devices.
3. Additional FX Blocks (2 or more)
4. Additional FX - envelope filter, pitch shift/harmoniser/whammy
5. Dual path configuration
6. Delay/Reverb spill over
7. Seamless patch switching