In my world the word diversity often (usually) refers to a mixed social identity composition of a group, typically encapsulated by socio-analytic categories like race, ethnicity, gender, class, ability, sexuality, age and more. Watch what this video (for a game that I enjoy and play with friends!) implies diversity is:

And, to some extent, they’re right – the game has all kinds of heroes – aliens, monkeys, scarecrows, overweight alcoholics and more. Unfortunately LOL is not diverse and quite cliche in that:

• Sexist cliches – Every female character is either a little girl (child) or a fighting fuck toy trope (with impossible proportions – the male characters have comparably more diverse body types). Of the non-human monsters (no, Yordles don’t count) there is only one with a female voice, as compared to dozens with male voices. And just in case you were thinking about suggesting the male characters have unrealistic bodies too, you might consider that this too is part of structural oppression.
• Colorblind racism – Nearly all of the characters have either white skin (Caucasian) or fictional skin (bright red, blue, etc…). You can spot a couple of champions who are probably of implied Asian decent and perhaps some purchasable alternative hero looks (you have to pay money to be black Ryze or Latina Karma?) that may include others. Fantasy and Sci-Fi worlds without racial diversity are certainly cliche and default whiteness is a form of racism (think of Band-Aids or crayons of peach color being labeled ‘flesh-colored’).

I’d also add that far too many of their characters seem to have some serious anger management issues, but that would make a little more sense in the context of battle.