Is there a roadmap for QOS on Cloud Managed Fireboxes?
Any 40 dollar router have QOS...
QoS and Traffic Management are actively being worked on. The feature request ID for that feature is UX-769. There isn't an ETA right now, but it should be available soon.
With that said, under most circumstances, marking traffic via QoS to be sent to the only next hop (the router's default gateway) where the QoS is often stripped and/or ignored by the ISP. QoS as implemented on most $40 routers is often a useless feature.
WatchGuard Customer Support