Hi,
Stingray looks okay.
CryEngine UI is no different Unity with flat icons.
Personally I like the new Maya UI and FL Studio. Perhaps Epic could make the icons editable and soon you can customize your own or pick up a fresh look in the market place.
btw
My taste is really good, I only play with the best.
Now if it was Unity UI, I would of say you’re right, but those two game engine’s UI can’t stand shoulder to shoulder with Unreal.
Just my opinion.