These new designs manage to get so much wrong that it's almost impossible to think a human being came up with them.
For fuck's sake, Upgrade manages to have one of the sleekest designs of all time with some of the best use of color I've ever seen. It communicates the idea of a technological organism to the fullest extent without ever feeling too alien or too human. It tells you right off the bat everything you need to know about the capabilities of this one guy through visuals alone. The black on green is nice as fuck to look at and stands out immensely compared to the fuck ton of other aliens in the omnitrix. Its never too much where it becomes visually complicated yet it still looks like a circuit you would find in a computer. And the white space is ingenuous, cleverly communicating that Upgrade isn't entirely solid and showing that he needs this white space as it provides stability to the rest of his body. It only adds to the contrast and, like another anon mentioned, is visually reminiscent to the Omnitrix giving further information to the origin of this thing without ever saying anything
Then you get to the new design. The new white space is jarring and comes off as a weird spandex tubetop. The purple color scheme and more complicated and cylindrical design makes him look more magic related than scientific or alien. The fingers try to go for what may be a wire plug inspired look but just comes off looking like shit. Another big problem is the lack of a strong contrast. Dark Blue on Purple on White-ish Purple isn't a good choice at all. It blends together way too well for this character's intended look and makes any shiny effect look like a shadow. Fucking Terrible