The only thing that V arranger needs is someone taking the time to make high quallity soundsets compatible with T5, PA3x and G70..
Or just a high quallity soundset with a few thousand sounds and an active community creating styles, and converting pro styles to this soundset....
Kontakt VST would be an awesome enigine for this...
The software itselves is great..... Now it needs standarisation, so people can share their styles and use other peoples styles withouth edditing, or being dependant on a hardware module..