How to get real attr values in didReceiveAttrs hook, if it's a mutable cell

Please see below sample code. Given I have a component my-text-box

my-text-box.hbs

I want to observe the changes of value property via didReceiveAttrs hook instead of observers for better performance.

my-text-box.js

didReceiveAttrs: function(args) {
    if (args.oldAttrs == null) {
        // This is the initial render, but I don't need to anything here.
    } else if (args.newAttrs.value != args.oldAttrs.value) {
        // supposed `value` was changed from outside, I can do something here...

        // BUT, `args.newAttrs.value` is not always the prop value, 
        // `Ember` would automatically wrap it with `` helper. 
        // The data structure would be: 
        // {
        //    value: value,
        //    update: function (val) {
        //        source.setValue(val);
        //    }
        // }
    }
}

What I want is that I don't have to care whether the attr value is a mutable cell or not, I should get a way that always get the real value. I see there is a HTMLBars hook ember-htmlbars/hooks/get-value but it's not exposed to public API. And what I'm thinking is that maybe Ember should change both newAttrs and oldAttrs to have direct values instead of those mutable objects.

Does anybody have a way to handle that? Thanks!