Everything the show did well:
-Every character from the heroes, to the villains, to the side-characters and even characters of the week are really well written and useful throughout the entire show.
-Great acting from the cast and arguably the best acting in the franchise so far. Barely any character of the show feels like they're bad at acting, at worst they're decent. The only noticeable one is a character introduced in the second half, Prince and even then he's not bad by tokusatsu standards, just worse than the rest of the main cast so the gap in acting feels noticeable but it really isn't a deal breaker.
-Amazing serialized story from start to finish, barely any episode feels like filler.
-It being the most serialized Sentai show so far, even managing to be more serialized than Dairanger, Gekiranger and Kyoryuger makes the show feel distinct from the other seasons from the franchise.
-Fantastic soundtrack.
-Tons of subtle foreshadowing makes the show really rewatchable.
-Fantastic world-building, ambitious fantasy setting where every country feels unique.
-Both the hero team and the main villains are filled with charisma.
-The show never has a considerable drop on writing quality.
-Ambitious high-stakes finale.
-Jeramie is arguably the franchise best extra ranger, due to how well his dynamics are with the rest fo the cast, it never feels like it fractured their dynamic or that he takes too much screen-time
-The mech fights are consistently amazing and among the franchise's best.
-The monsters of the week in the first half are really great consistently.

Everything the show did bad:
-The show's fights have a severe overuse of slow-motion, resulting in the opposite effect and removing most of the weight of the fights while also making the good choreography hard to appreciate.
-Despite the mecha battles being amazing, the they barely use them in the second half.
-While the crossover mini-arc with Kyoryuger is really great, Kyoryuger's lore actually intertwines with this show's plot and it has heavy spoilers for that show so it means that a portion of the show would be hard to appreciate if you haven't seen Kyoryuger prior.
-While the CGI backgrounds are mostly good, especially for tokusatsu standards it still can be really distracting at times, specially during some fights.
-While Rita is a really likeable character overall she gets considerably shafted compared to the rest of the rangers and her backstory isn't properly explained.
-While the main antagonist is extremely charismatic, most of his decisions being mostly dependant on what's fun for him isn't really a thing for everyone and might come off as cheap writing for some.
-The people of Shugodom can come off as too trusting and kinda dumb at times.

Reasons for the show strenghts:
This show was a massive passion project by producer Omori and main writer Minato Takano. He was out of ideas for Rider shows and really wanted to go back to doing Sentai, so in order to secure his position as the next producer in spite of producer Shirakura 5-year plan for Sentai, he started pre-production in secret alongside producers Mochizuki and Yousuke Minato. Having the manpower of 3 producers with barely any restrictions and more time than your usual mainline Toei tokusatsu production made it so that the show could have more high-quality CGI and a better thought out setting. While Toei's condition for greenliting the project was the removal of producers Mochizuki and Minato, their set-up was already done and main writer Takano knew how to develop their ideas + Omori who was the main creative source remained.
The staff opted for actor hiring strategy that the franchise has had since Kiramager of hiring more slightly more experienced actors than usual.
The show's main director Kazuya Kamihoriuchi is among Toei's best and made the emotional scenes and the Mecha fights really stand out + also he helped with a lot of the creative output after the show's timeskip.
The show made use of Toei's new led room which also led it into it being greenlit. This made it so that could properly create their ambitious fantasy setting.
Main writer is really good at character writing and really cares about lore.

Reasons for the show flaws:
Producer Kazuya Kamihoriuchi tried too hard with the action resulting in a severe use of slowmo and cycling back to being kinda bad.
Despite the CGI being better than most Toei tokusatsu shows due to having more time, it still isn't that much more time, so the CGI is still very flawed.

Overall:
Easily one of the best Sentai shows, it just barely has any big flaws besides being better enjoyed if you've watched Kyoryuger prior. Arguably has the best characters, acting and world-building in the franchise. High recommend, specially if you're into the storytelling style of Shounen anime/manga. I could only see someone not liking the show if they find the CGI too distracting to enjoy the plot or if the characters don't really jive with you in the first few episodes of the show.