User blog comment:Math34/The future of League of Legends/@comment-4290320-20150824092452/@comment-5077844-20150824190737

There will always be some champs favoured by Riot (Lee Sin *cough*), but I don't think anyone can complain about a lack of diversity. They did a lot to make more champions viable and the reason for seeing the same champs over and over is because they just have good kits that work well, thus they are spammed in ranked where, guess what, it matters if you win or not.

take Thresh. He's probably the best support in this game right now, not because of numbers but because of how flexible his kit is. That's not "riot favouring a champ", that's Riot having done a good kit that pretty much makes the champ a top tier pick because he's just that good.

As for Riven and Rengo...they're annoying, but not exactly problematic. The champs that get usually nerfed are those who actually have an impact on the meta and or competitive play...which neither of those 2 have. they can't just nerf every champ that some people might find annoying, especially if those champs don't even perform that well in the first place