It's a concept show. It has pretty animation, complemented with an appealing art style. It attempts to develop a vivid world, all the while presenting, and accentuating themes of acceptance. It tries to do all that, but it succeeds at none of that.
Aside from the concept itself, there's absolutely nothing novel about this. It has a vapid antagonist, inclusive to a totalitarian, more technologically-advanced society. Antithetic to that, is a more 'human', less-technologically advanced society. Both view the other are being the inverse of the other -- both literally in the show's rendition of physics, and figuratively in the values which they hold dear. The show's primary theme is acceptance, but because it hosts such a generic cast of characters, and an unconvincingly forced, brusque romance, it does little to make its argument convincing.
The show ultimately raises more questions than it answers. It's labeled as science-fiction, but it does nothing to actually explain what's scientific about it. If science is the process to which facts are discovered through trial and process, then the show's display of science is akin to didactic dogma. If it was the show's intention to be this 'meta' [by juxtaposing the lack of plot with the lack of justification practiced by one of the sides], then by all means, this show ought to be lauded as being revolutionary. In the more likely occasion in which the show was simply sloppily written, it'd ought to be scrutinized.
Nonetheless, despite all that, the show did have a concept with potential. The difference between Eve no Jikan and Sakasama no Patema is that the former show actually had focus, it was actually worth watching outside of its aesthetics. Sakasama no Patema didn't adapt, or write a well-thought out plot as much as it did a spur-of-the-moment draft inspired by a late-night session of methamphetamines tacked on with LSD. The movie presented an ultimate end-game midway through its completion, but it never bothered to end it. If this were an essay, and the prompt was "How to unite all humans", then it'd be akin to having ended it with the line "And that's why I like walruses the best."
In the end of it, the show was nothing more than a pretty display of artistic colors. It's artsy in its display of science, and it's artsy in its plot. It has a generic cast of characters, most of which are somewhat endearing. The development of romance between a certain two individuals seemed tacky, rushed, and undeveloped; it was done for the sake of symbolism. When a work defers verisimilar human sentiments to objective symbolism, then the work becomes nothing more than a brute, showcase of philosophy. While this work was not so egregious in doing so, it certainly didn't help out its characters. Nonetheless, even had the main cast been properly developed outside the cursory glance, the monochromatic antagonist would have invariably ruined an otherwise, varicolored world.