We could solve champ diversity issues with more polarized match-ups

We've gotten to a point where pro play see ever-decreasing proportions of the champ pool played because everyone's in a state of "We're relatively similar in power, but those guys are just better atm". As much as some may disagree, if the game had more polarized match-ups, we'd probably see more champ diversity.

Let's say...Janna, for instance. Really strong support that just sits in the backline peeling all day. What if there were a few champions that screwed her play style over more than just "Aye, I landed a pull!" (cause that'll screw anyone over early)? Then yea, she's strong like she's been for a while now, but the risk in picking her early is the threat of getting counter-picked later in champ select. If you do get counter-picked? You can have teammates attempt to balance the match-up out by picking champs that can negate the initial disadvantage.

Now, yea, I know LoL isn't that type of game, but note that there's only going to be X many different ways to viably approach a match, and when a niche/gimmick flops, we get stuff like Skarner's stupid rocks, Fiora's team-wide heal which still has me wondering why that wasn't a self-heal, or Morde's definitely-not-forced dragon passive. Maybe some champs could fill the niche of simply being really strong against specific types of champs and scenarios? You know, outside of all assassins being strong against all carries unless feeding.