It does not make sense at all that a snippet like this:

{{someVal}}
{{#each profiles as |profile|}}
    {{profile.username}}
    {{someVal}}
{{/each}}

changes the current context, instead of just assigning the new context (the current element of profiles) to a new identifier (profile).

{{someVal}} should be accessible inside and outside the {{#each}} block, instead of forcing us to do this:

{{someVal}}
{{#each profiles as |profile|}}
    {{profile.username}}
    {{@root.someVal}}
{{/each}}

If profiles already exits in the current context, it should be overwritten.