as for nose bounce.... you may rid yourself of it some by using scaling..... but the main cause of nose bounce I have found has been those people who use Combat Trim or who manually trim and do not know what they are doing....
Before we start giving recommendations as to how to reduce nose bounce issues, we need to make sure that his definition of 'nose bounce' and our definition of 'nose bounce' are in fact, the same thing.
It seems to me that the OP considers 'nose bounce' to be the action that happens when you are in a dive and you let go of the stick. The stick centers and the nose 'bounces' upwards. The reason for this is more speed = more lift. When you center the controls, the plane wants to level out because it is speeding up as it dives. This is normal aircraft behavior, but can be minimized by using trim... you can definitely use manual trim, but I've always made good use of the "automatic trim set" control (period key). What that does is matches your trim forces to your current stick forces so if you let go of the stick right after pressing the period key it will continue just as you were still holding the stick in that position.
To me, 'nose bounce' is when you overcompensate aiming at an enemy... Example... you are pointing a little low so you pull back just a hair and the nose snaps upwards above the plane, making it difficult to make fine-tuned adjustments to get your nose right on target. This can be caused by the spring force of the joystick changing (traveling through center for example)... pot spiking (X52 doesn't use them in X and Y Axis)... poor joystick quality... incorrect scaling settings, etc etc etc... For me, getting rid of the X52 was what I had to do to reduce this issue.
I replaced it with a G940 (say what you want but I'm 95% in love with it) and force feedback aside, I've found it to be very precise and accurate... so much that I was able to turn off scaling and deadband altogether with it. It does have what's known as a 'reversal bug' which causes symptoms similar to what I describe as nose bounce, but it's still only a fraction as to what I dealt with on my X52. Also, after almost 3 years of trouble-free use, my X52 was starting to develop a bit of physical play in the center... which while mild in nature... was becoming more and more annoying every day. The Force Feedback does add a whole new level of immersion into the game as well, and I can push the aircraft just a little bit more than before because I now have the added sense of feel.