I have the same issue.
And yes the router is rebooted and works with the newest firmware.
We are 2 players in the same room with the same router. I play with Lan and the other with WLAN.
The other player with WLAN hasn't issued.
But I since the last 3 days.
My other games are really fine. With GW2 or New World alpha I haven't issues. FPs always on 60.
So it isn't an Internet issue - it is a SWTOR server issue.
I guess BW /EA works in the back for implement 6.3.
I will try it with VPN again. Another server, another country...