Got a reply from Tech Support. Didn't really help much but he did give me a download link for 1.5.1 firmware, I'll see how it goes.

ftp://ftp.draytek.com/Vigor2750/Firmware/v1.5.1/Vigor2750_v1.5.1.zip

My speeds are still a few megabits less in both directions then what they should be when I use the vigor

Does anyone have any idea why upload is slower with the vigor?

My Thomson gets 8.96mbps constantly
Vigor gets 5-7mbps

I've tried playing around with MTU sizes on the router but that doesnt help. Removed the QOS rules, nothing.