When this season started, Princess Dive got me really interested due to the above-average visuals and cute characters. After watching it, I got exactly what I expected - a lot of waifus , some stupid antics and minimal to no plot development.
Story-wise, it is clear from the get-go that this isn't the focus of the anime. Sure there are hints regarding the pasts of the characters and indeed there were some scenes, particularly in the last episode that attempted to expound some character arcs, but nothing that really allowed you to really know and understand the characters themselves and their motives.
This lack of understanding between the viewer and the characters, was to me, the weakest part of Princess Dive. You have these interesting character designs, particularly the waifus, but there is not really enough substance that allows you to really love or hate these characters. Instead, you simply admire the characters based on how cute they are, and nothing more.
The comedy, although not as spectacular as some of the other shows this season was alright - it was neither too boring and generic nor was it excellent.
Overall, Princess Dive is the type of anime that you pick up when you just wanna put your brain to ease and simply watch something visually appealing, with just the right amount of humor to keep you invested, but not addicted. Definitely suggested for the array of interesting waifu designs, but not for people looking for an anime with good plot or characters.