Yeah I have always preferred the separate the upload/download into their own graphs. It gets worse when you have WAN2 there, as you can now no longer see upload for WAN1. That color becomes used by WAN2 (even if there is no traffic). So all you get now is the darker blue bar for WAN1 upload and download.
In your example, the light blue above the dark blue is your upload, they stack it so you can see the total but I would prefer they didn't. If you mouse over any point, it will actually show you the upload/download numbers uniquely.
Cellular traffic was broken off into a purple-ish color, so they HAVE the ability to make that graph much more robust.