Drupal 8 headless with BackboneJS, retrieve single entity with referenced field

Hello friends,

I'm building up a contact directory search with Drupal 8 and Backbone. The idea is to benefit Drupal 8 to set up and expose search data via Views with Json format.

And I have 2 questions regarding setting up REST endpoint

1. When retrieving a single node from Backbone, I'd call /node/[nid]?_format=json and get
   
   {
    "nid": [{
        "value": "55"
    }],
    "uuid": [{
        "value": "ec524ba2-5514-4179-a916-2213d40a0641"
    }],
    "vid": [{
        "value": "55"
    }],
    "field_acc_type": [{
        "target_id": "4",  // <- referenced field
        "url": "\/taxonomy\/term\/4"
    }],
   ...
}
   
   field_acc_type returns with target_id and url, which mean I need to fire another request to server to retrieve that account type entity?
   Is there a better way to fire only 1 request and get all data I need ?
   
   

2. Rather than calling /node/[nid]?_format=json, I'd prefer to create a views with REST export because JSON structure is more simple than the JSON in 1st question. However, data output of the view is an array (yes, I understand what views means to do). Is it a good practice to try altering the output to show only 1 JSON object (using hook_views_pre_render, or hook_views_post_execute ... )
   In stead of
   

   [
  {
     title: "Node 1",
     type: "account-drupal" 
     ....
  }
]
   
   to make it print out
   
   {
     title: "Node 1",
     type: "account-drupal" 
     ....
}  <- not an array

   Any help is going to be much appreciated : )