These /dev diary YouTube videos just show me how little Riot learns from their own mistakes.

Don't fuck with champions being able to be played in multiple roles.

Let's use your own example of Ekko as a simple case study.

1. After the changes you made, he was still better off as a mid laner. So why would I play him Jungle when my Mid Laner could take him and have a higher chance of success to begin with?
2. Ekko is a Diver/Assassin. In the Jungle, there are at least 15 Champions that would need to be stolen away from me or banned before I would even consider picking Ekko. And that's just other Jungle Divers/Assassins - not Junglers as a whole.
3. What's the best-case scenario with these changes? You let a handful of Ekko one-tricks flex pick him in a extra role because they're too stubborn/bad at the game to play a meta Jungler for the 1 in 10 games they get auto-filled? On the other hand, the worst case scenario is that you make completely unnecessary, unwarranted, and unwanted changes and completely break Ekko as a Jungler. There's a reason Riot spent a season and a half balancing him around being a Mid Laner.

As for your mention of the simply moronic idea of introducing an item that allows teams to not run an ADC - just look at what happened with Mordekaiser.