After being with the issue since release because of the overseas server. I have myself learned to adapt to the latency, to account for it when an AOE goes off. But most of the time this cannot be helped with half a second AOEs like some bosses do and you just have to face the consequences.
Regardless of however decent your ISP/connection quality is (mine is around 70-80Mbps down) the problem wont be solved unless SE invests in giving the EU continent its own Data center.
My cousin plays with me and he has top of the line internet at 150Mbps but still has massive latency and only 2/4 signal bars on the "world status" in the top right corner of the screen.
I'm not very confident in PvP and hardcore instances if the EU has to compensate at the expense of improbable effort/gameplay for lag.
