Sentai franchise is on a near death situation IMO. Toei should've make a high budget Sentai mini-series, like Black Sun, to revive it. Or make a mature series like Jetman.
I feel like this season is some kind of a Prologue/Set-up for the final saga, they bring almost all of important characters from previous season. Only Nagayama Eita, Fujiki Naohito and Ryu Raita's character who haven't make a comeback. Some important point:
-Shigekatsu getting a divorce -Korogi is probably having the same treatment as "Incapable trio" going further , his feud with Daimon isn't over yet+his character is underdeveloped despite having a strong start. -Ichiki and "Nurse X" may be an Important character for the next saga. -Hachisuka-Daimon may be the romance angle going further. -This is the first season where the seasonal secretary is heavily involved in the story.
Now we can see the "American" aspect of the show, the way they're killing one of (supposed) regular, introducing the big bad, and the usual "bad guy is MC's former buddy".
https://www.youtube.com/watch?v=bYbnYdTygAg
-Shigekatsu getting a divorce
-Korogi is probably having the same treatment as "Incapable trio" going further , his feud with Daimon isn't over yet+his character is underdeveloped despite having a strong start.
-Ichiki and "Nurse X" may be an Important character for the next saga.
-Hachisuka-Daimon may be the romance angle going further.
-This is the first season where the seasonal secretary is heavily involved in the story.
She could be a robot, getting "brainwashed", or simply an amnesiac genius.