Hm, may just be strange camera angle but it looks like your coolant outlet angles right a fair bit?

I have a 07 2.5 turbo motor and it seems to go straight forward to the firewall. I ended up routing it straight down from there to the flexi pipe, which is looking like another mistake I've made!

I've got it bled for now, so I'm not in a rush. Next time I have the system open though it may be worth me taking off all the flexi pipe and re-routing similar to yours with some 90 elbows and straight sections.