Kanye West wrote:
Probably by nerfing bruisers to oblivion tbh.
In a way that would help at least make them more favorable, but It won't be enough to bring tank junglers back because people would just keep playing Kha'Zix, Elise, and Lee sin over them. I know Lee Sin is a bruiser, but I doubt they will touch him after the shit storm on reddit when they wanted to rework him a few months ago.
Anyways not all bruisers are an issue it's the ones that have overloaded kits in combo with tank junglers having shitty itemization (some with terrible clear speeds) in the jungle. Maokai, Amumu, and Nautilus are more than capable of competing with the more balanced (weaker) bruisers junglers like Warwick, Volibear, and Udyr. Problem is stuff like Vi and Lee do everything a tank jungler wants to do but way better.
Itemization is a good start and hopefully they can make something that isn't favorable on stuff like Vi and Lee because that will just create more problems.