Yes, there is always going to be a pool of 5-10 champions that are best in any given area and role. I don't really think I can deny this, however, in many other roles, especially mid, and top there are more people that can at least function well even if they're not the tip top best. You still have a large chunk of supports that can still work even if not in favor and all the adcs still do something and function.
This is not how I feel the jungle currently is. So many former junglers are so hardcore trash right now simply because they struggle with the early clears that much. You don't get this in top where it's a champ vs champ and skill vs skill. No, right now, you're trash because you can't deal with npc monsters that basically just do nothing but auto attack. By the time your done with your clear your so messed up you have to return. Some it's so bad that a few clears can send them back for sometime till they get items becoming a complete nonpresence to the lanes even if that's one thing they could do with cc or damage.
So for me it's not about some little pool that hosts the glorious four or five. It's about the secondary pool that should be a vast wealth that should still function for the players that love a myriad of jungle champs that now simply can't do it. The current jungle hasn't just changed who is favorite, it's completely deleted the sub optimal.