Could there be some way to disable this? I've never had problems with copying not keeping the pressure, but now that it does, I always have to worry about things breaking when I paste near them.
It would be possible to do with a lua script. saveStamp and loadStamp both have an argument includePressure, which changes the option. You would have to make a lua script which overrides the default stamp saving and then calls this function with includePressure set to false. Similar to a script @LBPHacker already has.