I fly my 747 v3 on P3D and I've been experiencing a somewhat annoying event where if I use my hat switch to move my view around, it runs very slowly. But this has nothing to do with fps as I run at a constant 40 fps at default airports and 25 to 30 fps at addon airports and fps does not change when I try to move my head around. When I use the spacebar to move my view it is very nice and smooth, but not with the hat switch. So is there just an easy little fix in the settings menu or would it be a good idea to invest in chaseplane?

Dumb question time, but it may have some relevance, seeing as FSX:SE is kind of related to P3D, and I get this on freeware planes, hence my asking. :)

What view are you in when trying to pan around?

If I'm in virtual cockpit then I can pan around normally, same in external locked spot view. However, if I select Right seat for example or centre pedestal, or left engine view, then trying to pan with the hat is very slow... I don't know why.

I'm panning around in the captain's seat, but it's also the same speed as in the FO's side

First check the control assignments to make sure your View(pan) entry for the top hat has the repetition rate slider to the right.  Mine is set by default to the center and works the way I like it but tastes vary.

Then you can play with the pan/zoom scaling factors in the camera.cfg but you shouldn't have to do that.