My only suggestion at the moment is designing a Rane performance DJ/studio mixer much like the TTM-56 but with features better suited for both performance/recording. Heres a few of my suggestions for this performance dj/studio mixer.

1)Individual direct outputs for multitrack recording (each turntable or cdj can be sent separately through 2 stereo direct TRS outputs on each channel) STANTON SA-8 is the only mixer like this at the moment. This would become the no brainer choice for MIX tape and studio/live djs recording with SSL or a tradition setup along with hardwear and software multitrack systems. Lots of possibilites on this alone in other areas of mixing with Rane quality.

2)True transforming switching not directly related to the phono/line switch. No more reverse switching the transform switches around to use both CDj or turntables. (Pioneer DJM-909)

3)Slightly longer throw on the transform switches (Vestax PMC series mixers) Transform switches on RANE and Pioneer dont feel as good moving back and forth, but both are built with tank like quality.

4)Slightly longer magnetic Channel and Crossfader that would suit both turntablists and mix Djs better but add cutlag and fader feeling adjustment on every channel. (Pioneer DJM-909) This could make Rane the only choice on the market.

4)dual XLR/TRS and RCA on the Master output for better installation compatibility.

5)Dual XLR/TRS mic connection

6)Faderstart compatibility for CDJs (Empath)