I would love to take the XY Grid a step further and be able to control 4 parameters at once on each side of the grid. If this is possible now, feel free to correct me. Otherwise, just food for thought 
Could you explain what you mean by “on each side of the grid”? Do you mean like there is 4 parameters - one in each corner - and the centre of the pad is Value 0 for all parameters? Or do you mean the X axis controller would control two separate parameters as would the Y axis controller? If it is the latter, you can do this with Bome MIDI Translator Pro.