These changes appear to be client side at the moment, sort of catching up to where Universe is in some aspects. For those who wanna see the ones that are actual changes from what's displayed on Universe as opposed to just those champions intro paragraphs:
: "One of the ancient darkin, Aatrox was once a peerless swordmaster who reveled in the bloody chaos of the battlefield. Trapped within his own blade by the magic of his foes, he waited out the millennia for a suitable host to wield him - this mortal warrior was corrupted and transformed by the living weapon, and Aatrox was reborn. Though tales of the darkin have now passed into legend, he remembers only too well the destruction of his race, and wreaks his vengeance one sword blow at a time."
: "Anivia is a benevolent winged spirit who endures endless cycles of life, death, and rebirth to protect the Freljord. A demigod born of unforgiving ice and bitter winds, she wields those elemental powers to thwart any who dare disturb her homeland. Anivia guides and protects the tribes of the harsh north, who revere her as a symbol of hope, and a portent of great change. She fights with every ounce of her being, knowing that through her sacrifice, her memory will endure, and she will be reborn into a new tomorrow."
: "A traveler from beyond the stars, Bard is an agent of serendipity who fights to maintain a balance where life can endure the indifference of chaos. Many Runeterrans sing songs that ponder his extraordinary nature, yet they all agree that the cosmic vagabond is drawn to artifacts of great magical power. Surrounded by a jubilant choir of helpful spirit meeps, it is impossible to mistake his actions as malevolent, as Bard always serves the greater good... in his own odd way."
: "A master of Ionia's ancient martial arts, Lee Sin is a principled fighter who channels the essence of the dragon spirit to face any challenge. Though he lost his sight many years ago, the warrior-monk has devoted his life to protecting his homeland against any who would dare upset its sacred balance. Enemies who underestimate his meditative demeanor will endure his fabled burning fists and blazing roundhouse kicks."
: "A demonic amalgamation drawn from the nightmares that haunt every sentient mind, the thing known as Nocturne has become a primordial force of pure evil. It is liquidly chaotic in aspect, a faceless shadow with cold eyes and armed with wicked-looking blades. After freeing itself from the spirit realm, Nocturne descended upon the waking world, to feed upon the kind of terror that can only thrive in true darkness."
: "Syndra is a fearsome dark mage with incredible power at her command. As a child of Ionia, she disturbed the village elders with her prodigious but reckless use of magic. They sent her away to be trained under strict supervision, but she quickly surpassed her mentor and discovered he was restraining her powers. Betrayed and disgusted by such cowardice, Syndra eliminated her teacher and struck out to destroy all who would try to limit her potential, dark spheres in hand."
: "Undeterred by even the most dangerous and threatening of obstacles, Teemo scouts the world with boundless enthusiasm and a cheerful spirit. A yordle with an unwavering sense of morality, he takes pride in following the Bandle Scout's Code, sometimes with such eagerness that he is unaware of the broader consequences of his actions. Though some say the existence of the Scouts is questionable, one thing is for certain: Teemo's conviction is nothing to be trifled with."
: "Udyr is more than a man; he is a vessel for the untamed power of four primal animal spirits. When tapping in to the sprits' beastial natures, Udyr can harness their unique strengths: The tiger grants him speed and ferocity, the turtle resilience, the bear bear might, and the phoenix its eternal flame. With their combined powers, udyr can turn back all who would attempt to harm the natural order."
Changes of note: Aatrox more clearly speaks to him conquering a host and his actual goals as an individual, Anivia's mentions she's a demi-god, where as her current bio doesn't, Bard's got reworded and no longer calls him a spirit, Lee's talks about embodying the dragon spirit, Nocturne's describes him as demonic in some aspect, and him originating from the spirit realm, which we know of from Shen, and Teemo's apparently out scouting the entire world.