I think you need to realise 90% of the items in the cash shop are going to be aimed at getting the F2P players to spend cash on boosts.
Someone like myself who has multiple level 50s and does not need/want to level another character only has Operations and a few more WZs to look forward to, how is that worth $15 a month?
so what your saying is, you dont know why you are spending $15 dollars a month now? I mean thats what every mmo is like once you get to 50. You pvp or you raid or you level an alt. welcome to mmo's