I think that the first "fab five" wraps are fine. They look like they were thoughtfully created specifically for a bus. Moreover, they fit within Disney Transportation's overarching bus theming: bold solid colors, thick lines, etc.
These new designs are a departure from that style. They don't look like they were created with their context in mind, and they do not mesh with the previous style at all. Like others have said, they look tacky.
Busses are not the most important thing at Walt Disney World, but I think these new wraps are notable as an example of careless IP placement. With the first wraps, the IP is contextualized and integrated into the theme. With these new wraps, the IP disregards context and theme.
Across all areas of Walt Disney World, many of us are fine with the former but not the latter.