James, don't be afraid of PRV. And yes, it's piano roll view. You'll have to use it if you're going to do synths and keys, etc. At least, I can't see how you'd get away without using it. :) I think it's alt 3 in X2. (select your piano track first) You'll see all those cool little rectangles, which are the notes. The darker the color, the higher the velocity. You may or may not see the lines running up to each note, showing the velocity. In 8.5 you simply had to right click to choose whether or not you want them to show...in X1 you have to go to the menu. But anyway, you don't need them to lower the velocity really...It's nice to SEE it though.
Anyway, once you're there, just select all the notes. The smart (mouse) tool actually works pretty sweet in X1 in PRV (not in staff view!)...you don't have to hit keys or icons to change it to select, draw and delete, etc. Once they're selected (draw a big loop around all of them), then hover over one of the 'notes' and pull it down and those velocities will all come down. (The other way to select them all is to just hit Alt A.) Just make sure ONLY the piano track is showing.
Anyway, once that's done, listen and see if you like the difference. Sometimes, if you pull them all down at once, you'll notice that some are too low to be heard. Then you can pull individual ones up too.
Have fun! :)