Why are you increasing bans to 10 in Season 7?
The answers are slightly different depending on whether you’re talking about the regular player experience or the pro experience, so I’ll answer both. Fortunately this was one of those situations where the change still makes sense for both sides, even though the goals are a little different.
For pro, the primary reason is to increase champion diversity, largely for the sake of the viewer experience. We think the game is more exciting when diversity is higher, assuming it is possible to achieve higher diversity without sacrificing overall game health. A secondary benefit is to hopefully create a more strategic and interesting champ select. Teams can try and build particular comps, while trying to shut down particular comps for the other side, which we think will be fun to watch (more on this in just a second).
For regular play, the primary reason is player agency. In the current design, some players get to pick first and some players get to ban. But we think most players (especially when they queue solo) just want to shut down whatever is most annoying in their lane (or whatever seems “overpowered” in the moment). Ten bans just happens to give every player the opportunity to ban something. Diversity is a secondary benefit we hope to achieve. However, we don’t realistically think we will get much more strategy to champ selection in regular play (except possibly for larger premades) since as I said, most players just want to ban their lane/power. I don’t mean to imply that regular players aren’t thinking strategically. It’s just a different environment than in pro, where teams not only play together regularly, but even suspect what strategies their rivals may choose.
ok so "player agency" probably isn't what the OP seems to think it is to begin with.
Its not just interactivity but more about just giving people something to do or think about.