@proxos666
I'm reluctant to say I fixed the issue but I have made some headway. Previously I had my mouter (modem/router) plugged into the phone socket in the bedroom.
Ran some speedtests at that location and then relocated mouter to the kitchen. Ran a few more tests and noticed an instant 20% increase in speed as well as a much more stable connection. I still experience a few spikes here and there but substantially less noticeable and less severe. More in keeping with a standard wireless network.
Ran pingplotter for the SWTOR server and while still not ideal it seemed a lot better.
Hopped ingame and game works just fine. Still a few lag spikes while playing but nothing that makes the game unplayable.
Would still benefit from a direct IP connection to mouter but for now I'm pretty happy with the result.
Thanks for all the help man.