This season is kinda iffy and uninteresting, to say the least. The main plot is predictable with most of the main cast being uninteresting to watch. As it stands, this is essentially a season that aims to bring back old characters from the overDress era and have them fight with some of the cast, namely those who haven't gotten as much time to shine. In that regard, they did a pretty solid job, bringing some cool matchups that would've seemed like a pipe dream back during season 2. They did a solid job with it here, but nothing really adds to the plot in a substantialway that defines the tone for the season.
Most of the main cast at this point are kinda there to do their cardfights before moving on. Not even the main character, Akina, is really getting development anymore; he's basically just a main character who's defeating the obstacles in front of him, with not much more. The only character that is getting decent development is Erika, but even at this point, her character arc seems to be wrapping up (if it hasn't already wrapped up in the first place).
With the list of events basically being blatantly put in front of us, it's hard to recommend this season, especially when it feels like the primary stakes of the show are gone for the main character. They probably could have fleshed it out way more using this season's structure, but it ends up being the crew being dragged around to different places to fight the old cast. They probably should have set a roadmap for character development across the entire Deluxe arc instead of cramming most of it into season 3. Animation is still pretty good though.