Pianoteq Sustain notes

Hi, I own PTQ Stage edition. I like it. But the sustain notes in pianos are very short for me. It have low energy. If i play FFFF on lower notes on real piano, It take maybe 2 minutes? (I am not shure, but much longer then PTQ) for stop strings make noise. In PTQ it is about 15 or 20 sec. Maybe less. On real piano if I hold sustain pedal and play, after some time I got ball of sound - melody is not clear, and it need pedal up and go back to down. In PTQ I dont need pedal up and down, melody is still clear, because sustain notes are very short.

Is there plan to change this in future or it can be tweaked? Need I PTQ Standart edition for change it, or it is possible in Stage version? And it is possible to change this in Standart version?