A bit confused with a variety of actions and ways of passing them

So currently, while Controllers are still there, the actions can be defined both on Route and Controller. Keeping in mind that Controllers are going to be deprecated, I’m trying to stick with Route actions, and it works fine, when I assign them to buttons like following: click="'someAction' someParam" (btw, I use Emblem so that might be the core of my problem), but what I do if want to create custom component?

I found sort of solution here: Triggering Changes with Actions - Components - Ember Guides

But action helper doesn’t take action from Route instead it expects action defined on Controller. Is there some inconsistency? How do I use route actions in a fashion I’d do with buttons?