Everything the show did well:
-Good ranger team and commander overall.
-The pink ranger Momo is extremely likeable and almost all of her focus episodes are really great despite mostly consisting on filler.
-Really great villains overall, especially towards the final arc.
-Really great final arc.
-The villains feel like a force to be reckoned with due to them having already conquered most of the planet prior to the show's start, helps ups the stakes in a unique way compared to other seasons.
-The dynamic of the team being a military corp is done differently enough from other military seasons to stand out.
-Really good action both in mecha and outside.
-Most monsters of the week are entertaining.

Everything the show did bad:
-The transition of the show being one of the darkest Sentai ever made to becoming really goofy isn't smooth and hurts the characters of the main team with the exception of pink. They still manage to be pretty likable overall but the show's tone ends up feeling all over the place due to this change.
-The extra ranger Riki and Dorin aren't that entertaining due to being absent for good chunks of the show and their personalities not being that interesting. That said Riki feels consistently strong throughout the show and at least one can kinda buy his absence from the episodes due him working for Dorin first and being a hero second.
-The side characters that the show introduces later, the wacky scientist Kotaro and the Shida family aren't really that likeable nor that funny.
-The civilization of Pangaea feels underexplored.

Reasons for the show's strengths:
This was the first Super Sentai season to acknowledge Goranger and JAKQ as part of the franchise. Due to this this season was treated as the 20th anniversary of Sentai and the producer Takeyuki Suzuki wanted the team to be soldiers like Goranger. This season just like the previous one Kakuranger brought back Susumu Yoshikawa to co-produce to realize the ambitions they sought out to do.
Some people speculate that the pink ranger Momo was always supposed to have filler episodes prior the show's change of tone, so she was the character least affected by the change. But this is just a rumor.

Reasons for the show's problems:
The staff wanted to realize a hard dark setting to differentiate from previous seasons. But due to the Hanshin Earthquake that occurred prior the show's airing and even more due to the Tokyo subway sarin gas attack that occurred after the airing of the third episode, from episode 9 onward the show adopted a more comedic approach to its tone in order to cheer up the audience.
The high contrast of the show having one of the darkest starts to any Sentai season, the darkest beginning at the time it was airing to becoming whacky and comedic from episode 9 up to the start of the final arc feels really jarring. The new side characters introduced in the middle to light up the tone ultimately weren't that funny due to not being planned. However in spite of these changes the main characters and villains managed to stay likeable from beginning to end.

Overall:
The show's tone is all over the place and there's a few characters introduced later that drag this show down. But overall the show manages to still be great overall with a likeable team of Rangers and villains plus a really cool setting. I recommend this show if you're a Super Sentai fan.