I say it one i say it again i know this is no help but you might just happen to have to wait till the driver catch up with windows 10 and swtor. This kinda stuff happens in every OS Microsoft puts out it is why sys admins never rush to install new OSes. As the first release of the OS tends to be full of driver glitches with software. It takes a better part of 5 months to a year for video driver companies to get it right while the customer beats there head against the wall. I can tell you most likely swtor is not the only game that is having trouble like this with windows 10 and ATI most likely is working on fixes as we speak you may just have to wait. Not all games will run perfect right out of the box on a new OS install.
edit Also this is why you see every driver release note with fixes for games it is because as video graphic companies push the hardware to faster and faster speeds things get more glitchies
