You're absolutely wrong. I experience this with NO other game, only SWTOR and I play them ALL for hours and hours. SWTOR's performance craps out after 2-3 hours. If I manually close the client the client won't close, it'll just sit there with the screen being unresponsive.
Nothing else on my computer other than SWTOR is using much of anything in the way of resources and since this started happening with 1.6 it is a problem on their end.
It doesn't matter if I lower all the settings to low, it still happens.