Interesting stuff. I have not gone through the report, but my feeling is that the issue is not aircraft related, but airline related as it appears that the performance of all flights is monitored and an airline is notified if it has exceeded limits over a certain period of time. So it appears that there is no type per se too noisy or on the safe side.
Btw, Swiss will replace the RJ100 with Embraer 190s also on the GVA route.
On a side note: Which airline used the ATR72 in 2015 on 134 flights?