For the love of... need a solution to duplicate heroes!

They mentioned “benefits” from duplicates:

But given the following idea that improving HA is too risky as stated here:

I would guess that their solution will be something similar to

But maybe less. That might disrupt their ability to sell emblems.

Something right up their alley would be like 2-5 EHT. That exchange is set so that they’ll always profit, by reducing dupe 5* on benches for mostly food. They can market it as ‘getting an extra chance at a better hero’, when 90% of the time, it’ll be for all 3/4* heroes.