To be fair, having a lead use Stealth Rocks is a savant level strategy compared to having your last member be the face of hazard leads.
View attachment 527020
My gripe with Geeta is Pokemon like Garchomp, Salamence, Tyrantitar, Gholdengo, Dragonite, Ceruledge, and Blissey are all not used by important trainers, but she goes with Espathra and Veluza, Pokemon already used by Paldean Gym Leaders.
While Geeta's team is admittedly on the eh side, I don't see an issue with Glimmora being her ace. Like yeah, Glimmora's claim to fame in Smogon competitive is hazards, but that's because it's one of the few that has the privilege of having so many hazards capable of setting up in Singles. It's not like that's the only thing it's good for or being capable of. It has a very good stat spread, boasting a strong 525 Base Stat total, an extremely good 130 Special Attack and a good special movepool, and a good 86 Speed and decent 83/90/81, which by all means makes for a strong powerhouse worthy of being an attacker and Geeta's ace. Her Glimmora has good coverage with Sludge Wave, Rock Tera Blast, Earth Power, and Dazzling Gleam and coming off 130 Special Attack that's pretty deadly.
Frankly Glimmora being the face of hazards in Smogon is likely an unintentional use of it and likely not what they had in mind when designing Glimmora. I also imagine Glimmora being Geeta's ace is because it makes thematic sense, since it has very strong ties to the Terastal phenomenon, is noted afterward to be common in Area Zero, and Glimmet crystals being needed to create Tera Blast TMs also implies a connection. Especially since Geeta uses Tera Blast on her own Glimmora, it's a crystal flower so it looks natural in tandem with the Terastallization aesthetic, and she gives out the Tera Blast TM on two occasions.
Also that quote isn't from Geeta, but is from Turo/Sada at the end of the story.
Geeta using Pokemon used by Paldean Gym Leaders is actually a somewhat common occurrence in the games historically, she isn't the first Champion to have that tendency. Cynthia used Roserade and Lucario, the aces of Gardenia and Maylene, while Diantha had Hawlucha, Tyrantrum, and Aurorus, the aces of Korrina and Grant, respectively. Blue in Gen 1 used Alakazam and Rhydon, the aces of Sabrina and Giovanni respectively, as two of his three consistent team members. Steven also used Skarmory, who was used by Winona, and Alder used Vanilluxe, Druddigon, and Bouffalant who were used by previous bosses in BW1.
Really the one major issue I do take with Geeta's team however is her use of Supreme Overlord Kingambit that she has a tendency to send out earlier than when it should be. Kingambit is a legit deadly Pokemon and Supreme Overlord is a strong ability, but unless you play in a way that makes her send it out fifth it ends up never capitalizing on the Supreme Overlord boost as much as she could, even a 1.4x boost from four Pokemon fainting is strong but that's not always guaranteed to happen. Thematically her having Kingambit with the ability also works in her position as La Primera, the Supreme Champion among all of Paldea's Champions, the Top Champion and boss, but she doesn't actually capitalize on it as much as she could.
Ceruledge/Armarouge were underutilised for sure, I thought they’d be highly pushed as someone’s Ace given their pre-release stuff but yeah… turns out not.
Armarouge to be fair is effectively the honorary ace of Mela, one of the Team Star bosses, but only in the post-game sadly.
Ceruledge not being used by anyone however is a bit of an oddity yeah.
The anime does seem to be capitalizing on Ceruledge's popularity fortunately however, as the current anime has Amethio, a major antagonist in Horizons atm, use it as his main partner. Armarouge on the other hand is likely to show up, but hasn't done so yet.