I am noticing a drop off in trooper recently too - I hope it is not just folk giving up and doing PVP! I still don't have access to PVP yet but don't want to foget my troopers. I used to get around 500 to 700 points a day, now down to maybe 300- 400 though people still on-line according to my listings.
Oh well PVP must be a time eater!