Steemit UI is pretty poor, but Viper isn't any better.

Boxes are not a very readable format (they're scannable, not readable, and hard to scan at that when there are four-a-row). Therefore, pictures hold a heavier sway than usual, which is not a good thing if you're interested in media other than multimedia. Mobile view (list) is again cluttered with fat dividers.

However, what bothers me the most is the red background which looks nice only at first. As it is saturated (i.e. it's not mostly on the black-gray-white part of the spectrum) it will be much harder to read, view images, and it only defines the platform (Viper), possibly clashing with content, instead of letting the content (authors) embellish the platform. That means authors look thrown a bunch like cattle instead of being provided a place for their work.

I didn't like the visual design, but hey, cheers and best of luck!