It does cater to the adult cartoon crowd but it caters to trekkies in general. Mike McMahan has been a fan of Star Trek forever and as the showrunner did a lot of good universe building within the confines of the TNG era. It has a lot of callbacks and references and is just a fun and funny way to enjoy Star Trek.
I really liked it, I considered it one of the better shows in general, because being lead by a true fan and not just a writers room with notes allowed the show to be a fun little exploration and expansion of the universe, showing us the side of Starfleet we don't see very often.
Some people have criticized it for being too goofy with the argument that Starfleet officers are supposed to be professional. My counter is simply that not all officers are bridge crew material and there are so many mistakes that happen across all the random ships in the fleet that it's fun to center on one and see how it's going.
I was going to say, it has been my personal favorite star trek series since voyager mainly because its set in the timeline I enjoy the best and its aesthetics. Also, it's just fun.
Cartoons do big concept high-action content cheap when live action shows have settle on cheesy low-rent special effects and set dressing. Treasure Planet, Atlantis: The Lost Empire, the Lion King - basically impossible to do right without spending a fortune a la Avatar or Peter Jackson's Lord of the Rings.
Even if you aren't doing Sci-Fi, you can get a lot of mileage out of the medium simply because the artist is doing so much of the leg work. Check out "Monster" or "Perfect Blue", two shows that had originally been planned as live action dramas but got converted to animation for budgetary reasons. Also, too, "Grave of Fireflies" if you want to have your heart torn out.
Cartoon Trek goes right back to the series roots - there was a cartoon version of the Kirk Trek from '73 - and holds up better than the live action original in terms of visuals.