Everything the show did well:
-Great hero cast that gets progressively more smug the more the show goes on.
-The main villain duo is extremely likeable and have really fun hijinks.
-The villain generals are all entertaining.
-Really great final battle.
-Great battle choreography on the ground fights.
-Lots of mecha variety keeps the giant battles consistently fresh.
-Amazing soundtrack.
-Really funny show overall.
-Manages to have a pretty natural progression of stakes.
-Cool world-building here and there.

Everything the show did bad:
-GaoYellow becomes more of a joke character once GaoSilver joins the team.
-GaoBlue gets less focus episodes than everyone else which considerably hurts his character in spite of being likeable overall.
-GaoBlack is often weirdly cut out from fights when he's not the focus of an episode.
-First Super Sentai show to go hard on CGI, so it's used more often than usual.
-Pretty safe show overall.

Reasons for the show's strengths:
Main producer Jun Hikasa wanted the show to have more mechas than ever due to this being the franchise's anniversary and because he wanted to have multiple cheaper mechas instead of having few more expensive than normal mechas like the previous season Timeranger in order to make up for the poor toy sales.
Main writer Junki Takegami is really good at making the characters fun.

Reasons for the show's problems:
Main writer Junki Takegami likes to take the plot in a safe direction.
Main producer Jun Hikasa wanted to experiment with CGI due to this show being a big project as it was the franchise anniversary.
Otherwise I couldn't find much about the show's production outside prototype designs of rangers and mechas that were never used.

Overall:
While it isn't the most unique Sentai, it's still a really great show overall with really good hijinks between the 6 rangers, Tetomu, Yabaiba and TsueTsue. Highly recommend if you're a Super Sentai fan or are into Saturday Morning cartoons from the same era.