Due to recent features on the Shonen Jump Plus and Mangaplus sites, and hearsay about its tactical writing, I binged this series some time ago
They were not kidding. I cannot praise the Trigger system enough, it's such a cool and clever fighting system that rewards experience, creativity and hard work.
But first, I must make special mention to the B Class Rank Wars. Because it forces everyone to pick and choose from the same arsenal (as opposed to introducing new weaponry out of nowhere), it finally proved just how versatile the system's been designed. The way that two people can equip the same Trigger but use it very differently, plus the different loadout mixes, makes it so entertaining.
Not to mention, with this setup, fighters aren't differentiated by strength (most of the time) or better superpowers, and instead by skill, experience, creativity and resourcefulness. In that respect, it's similar to Alchemy from Fullmetal Alchemist, or the Magic Plate system from old Mx0 (but with a tighter arsenal), both of which I also love.
Add other spices like formations, teamwork, terrains, mutual-scheming and the freedom to inflict injuries as heavily as one likes, and you have a series that's full of wonderful, tactical, intellectually-nutritional fun. I've never seen a fandom more eager to speculate on strategy and weapon loadouts, like it's all some kind of video game or e-sport.
Ashihara-sensei may have taken the risk of spending the first 40 or so chapters building up the premise, but it all paid off in depicting Border as a pretty cool organisation. For all its internal discord, at the end of the day all members are competent in their respective fields and are united in their desire to defend Mikado City.
There's also such a sense of community with the fighters too. One day the members execute well-crafted plans in hopes of killing each other, the next they fight side by side to repel enemy threats (as demonstrated by the Galopoula invasion), or otherwise have a dinner together as though they've just finished a sports match. It makes Border so cozy.
And of course, I love seeing Tamakoma-2 steadily become a potent fighting force. Osamu's gradual development warms my heart, Chika is humourously overpowered, and Yuma's sheer creativity with just the Border Triggers is so entertaining (his style of Scorpion and Grasshopper is plain mean). Add in Hyuse with Viper and Escudo, and you have a team full of fun. I do want to see how the present them will fare against Neighbours forces though...
While it's a pity that so many factors kept the series from being more popular than it could've been, I'm just glad that Ashihara-sensei can take things easier while still maintaining quality