Keeping this short and precise.
The hate towards this season is unreasonable. Just because there isn't as many 'cute' or explicitly detailed areas as the previous seasons, the show is still great and should remain to be appealing to most viewers. The show features a lot more straight forward and climactic moments than usual, which also isn't necessarily a great thing, is also beneficial to people who want to see more action and less kawaii parts. Although the art does appear to be rather rushed, it is still enough for viewers to get the main point, and the anime imo never happens to seem melodramatic.