I think it would be a good idea, along with many people that I've spoken with, if SuperCell updated it to where heroes would be instantly upgraded (similarly to the way walls are,) as soon as you had enough dark elixir to upgrade it. With an increasing timer per upgrade of the hero's levels, it becomes frustrating to raid(especially as leagues are increased) as a vital supplementation to your army is missing. It's almost as if it would be better to just wait for the heroes to finish before attacking again, which again is taking a good amount of time to finish. I'm nearly at a week waiting on one of my heroes myself.
Also, they're *Heroes*, not like a building or defensive (building/tower defensive) unit. I would honestly understand it more if it took walls time to upgrade instead of Heroes, and that would be awful. At the very least I think it would be proficient to lower the upgrade time significantly.





