V1Addon with ember-source@3.28 does not work with App with ember-source@v3.25

I think it's because addons are resolving their capabilities local to them rather than the host app.
because `setComponentTemplate` (used in the output of co-located components), is referenced as `Ember._setComponentTemplate` in the app, and in the addon, referenced as: `_component.setComponentTemplate` (an import from the module (and real modules don't exist until ember-source@3.27)).

_shouldn't_ ember-cli-babel ignore whatever is going on in the addon, and determine ember-source version from the host app?