One of the main things dragging it down is the much higher concentration on romance. I really don't like romance plots, and while the show did a good job of mostly confining the romance-centered episodes to fillers earlier, here romantic plots are prominent in most episodes, especially with the Amazon Trio's constant flirting with the characters of the day, and I didn't enjoy them at all.
As well, compared to earlier seasons the plots were less interesting and more slow. Many episodes spent the first 10-15 minutes with slice-of-life or romance stuff, with the Monster of the Week stuff only happening at the end, and I didn't really enjoy that.
Yet, despite all that, most of the episodes were at least decent (though few rose above "good"). The main overarching plot was very cool as usual, and most episodes were interesting for at least half. As well, the humor of the show was more prominent than before and worked well, many otherwise boring episodes were lifted up just by how funny they were. The action scenes were their usual high quality and the animation looked great. And there was some great emotional moments at the end.
And despite the weaknesses the show still managed to pull off some great episodes, such as the final episode of the Amazon Trio arc, and most of the ending episodes (though they weren't up to the standard of the amazing climaxes of past seasons).
Overall, weaker than the others but still fine. People who liked the first three seasons will probably like this, but proceed with caution.
