I've got to say that is a pretty neat set-up. I'm a little jealous. Your goal was hardware for 200 Mbps QoS though? I'd say you've exceeded your goal in spades: QoS on ramips MT7621.
You may even be ready for 200 MBps someday, if only those pesky Gig ethernet ports could keep up with the CPU!
Seriously though, that device looks great. It will probably handle full speed VPN and QoS simultaneously for you for a while.