Only on the 1st glimpse, in fact its very user friendly as the concept is very logic and structured.
In the so called submix mode you simply click to an HW output and then mute/unmute the inputs (be it from the device, upper row, or from the applications / daw, middle row) or raise/lower faders to get the desired submix for this particular output. And this you make simply output per output. So in short, every output is a submix of its own.
On top of it you can work i.e. very comfortably storing your required routings to the 8 snapshots on the right side.
You can store/save to disks as many snapshots/workspaces as you like.
And for quick access you have on top 30 "workspace quick select" slots where you can store such combinations of snapshots and workplaces for quick access.
I personally never required more than the 8 Snapshots for i.e. controlling the routing for my demand.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub13