MIDI in Mod Matrix:
In mod matrix you can assign ModWheel, Expression Wheel or velocity and etc. but why dont add all midi controls? I know, you can map any control into midi, but it is not the same as in Mod Matrix, because you can set up how moch midi control change value, from 0 to 127. Midi controls can have own container, like Oscilators or other in menu.
Filter 2:
Sometimes it needs two filters. There is another "filter" called effect, but i dont like it much and have small possibilities. If i want hipass filter after lowpass, i can have only 2p hipass filter without possibility change resonance. If you decide add filter 2 , and dont know where to add it, make the option for change effect to filter 2. Filter 2 will be the same as filter 1.