...but reading Wikipedia on the Blue Lanterns really makes it sound like, ridiculously Marysuetastic. I'm talking like Eragon here.
Like Green Lanterns have this amazing power ring that can do practically anything, and only recently did they overcome the yellow weakness.
And along comes the Blue Lanterns, which can
Blue power rings are fueled by hope; they give their users the most power, but they must be near an active Green power ring to tap into their full potential. Otherwise, the blue rings are only capable of the default abilities (flight and a protective aura). This is because hope is nothing without the willpower to enact it. Blue rings must be fueled by true hope in order to operate at their user's command.
While within the proximity of a Green Lantern's ring, a blue ring can heal wounds, neutralize the corrupting effects of a red power ring, block the energy-stealing properties of orange rings, can drain the power from yellow power rings, and recharge a green power ring to twice its maximum power level. This effect can also negatively impact a green ring, as close proximity to the blue central power battery will overcharge a green ring, causing it to implode (taking the user's hand with it). If a Blue Lantern wishes it, it can also dampen the hunger caused by the orange light. A noteworthy ability of blue rings is the power to scan a target's psyche and create illusions based on their hopes. A blue power ring is capable of feeding off the hope of other beings, eschewing constant recharging while still performing impressive feats, including reversing a dying sun's age. Geoff Johns also confirmed that blue rings grant precognitive visions to their wielders.
Overcharge Green Lantern rings? Heal wounds? Precognition? Block vampirism of yellow? Slices, dices, and makes three different sizes of french fries?
I mean yeah this is of course only when Green Lanterns are next to each other...but they're allies. Blue Lanterns are good guys. They won't ever be at odds.
On top of that, Green Lanterns are the only Lanterns with their own books. Sinestro Corps kinda did but it was a big crossover event and they're just Green antagonists anyway. So you have heroes in a book that fight alongside Green Lanterns...and completely pull insane superpowers out of their anuses!
Again I admit I haven't read it yet, but from the sounds of it I'm getting the feeling that Hal and Kyle go to fight off Sinestro, and Saint Walker's like, "Sups." And when Hal and Kyle can't do it, Walker comes in and goes, "It's cool, chill the fuck out everyone, I got this." And Hal and Kyle go, man, those Blue Lanterns sure are great superheroes.