The upgraded fountains offer a surprisingly significant boost in the visual interest and kinetics of Celestial Park. The variety of patterns and sequences, number of different nozzle settings, angles that the water can spray, increased fluidity in movement, and strength / height of the streams makes up for the initial low-energy nature of a lot of the land. At least, a lot more than I ever could've thought.
Much of the foliage and greenery that went brown and grey during the Freeze of '26 earlier this winter has been replaced or nursed back to health, and so much of the park looks very good currently. The trees have already grown in a noticeable amount, so it's increasingly clear that within a few years, many of the rougher skylines and unshaded elements will cease to be.
I do agree with the notion that many of the more unflattering areas of Celestial Park would be improved with a more detailed floor pattern. The grey concrete does not do it many favors, very similar to UKR, while the few bits of genuine paving and renderings throughout like the Mario 64 Sun Mural in front of Stardust Racers, the comet-styled plaza between Stardust and Potter, and the Astronomica Splash Pad's compass theming and colors do a lot to make the land pop.
I think once we see a Parade arrive, a lot of this lands' deficiencies will be minor quibbles. Shading is growing at a decent pace, entertainment is hopefully on the way soon, and the fountains already have made the massive lagoons significantly more interesting to watch as you make the trek between lands.