Borderlands 2: Claptrap's Revenge

I'm noticing a difference in gameplay in the Ultimate Vault Hunter Mode, which adds eleven levels to the cap. What I'm mainly noticing is how during combat in four-player mode, the screen basically turns into an acid trip. Everyone is firing off elemental effects, grenades and AOEs as fast as they can pull the trigger. If you're in close combat it's virtually impossible to see what you're even shooting at with all the coloured blotches and numbers flashing over the screen, because you're kicking so much ass.
With new Bunkers & Badasses downloadable content, I'm wondering why they haven't implemented something like this before. It's the only content in the entire series that truly extends the main storyline instead of breaking away from it. In it, you're technically role-playing as three Vault Hunters from the first Borderlands game and Tiny Tina, who are role-playing as your Vault Hunter in a make-believe game, which is a bit trippy. While it's an imaginary scenario, your character is technically a real part of their real universe, and the imaginary items and experience you gain carries over, which is trippier. It's happened before in Borderlands where you were technically just acting out a story being told by Marcus, but the multi-layered aspect of the story makes this iteration a bit deeper. Really, the story is a metaphor for Tiny Tina coming to terms with Roland's death.
Tiny Tina herself was accused of being a racist character on Twitter for using ghetto slang while being a white adolescent... in the future on an alien world. She doesn't drop that routine in the new content, using phrases like, "shorty," often. Her depiction of Roland, a black character, is more racially tinged than the real character is, which is odd. Yes, Roland's black, but never acted "black," before. In the new content, Roland's just a character in the game being acted out by Tina, and uses the same slang as her. Is that racist? I found it odd that Tiny Tina was singled out as being racist, as she was never that big a part of the game before. She was much a part of the game as a bar full of drunken Irish stereotypes that no one complained about. Borderlands also features a black and Hispanic character as one of the four NPC Vault Hunters and has an interracial romance, plus at least one of the four original playable Vault Hunters is black (there's no telling who or what Zero is). The game doesn't get credit for that. There's always a strange juxtaposition in the game. For instance, there's the over-sexualixed Moxie, and her polar opposite, Ellie. Meanwhile, while you can play as a black chracter, or a female character, all of the bad-guys you shoot are white dudes (except for in the Hammerlock DLC, which no one plays).