Adding missing image + minor tweaks

pages/blog/david/20191226-graphqlite4.md

@@ -85,6 +85,9 @@ interface UserInterface {
 }
 ``` 
 
+Of course, a PHP class implementing this PHP interface will translate into a GraphQL output type implementing the 
+GraphQL interface automatically!
+
 ## Autowiring services in resolvers
 
 Some frameworks (Symfony in particular) can inject services directly in controller actions.
@@ -152,7 +155,8 @@ return new JsonResponse([
 ]);
 ```
 
-If you write your code like this, the `Product` class does not even know that it "has" a name anymore.
+If you write your code like this, the notion of "product name" becomes external to the `Product` class. Looking at 
+the `Product` class code only, a developer does not even know that it "has" a name.
 
 In GraphQLite 3, to do the same thing, you would have had to create an "external type", which led to having
 fields declared in 2 classes. Same result in the end, your `Product` class is stripped from 
@@ -161,7 +165,10 @@ possessing a name. Autowiring allows you to keep all your fields in the same cla
 ## Validating user input
 
 GraphQL input types can now be [validated using simple to use annotations](https://graphqlite.thecodingmachine.io/docs/next/validation).
-The way you validate those will depend on the framework you are using, since we are tapping directly into your framework's
+
+I must admit I was first reluctant to add validation to GraphQLite, but this was certainly the most requested feature.
+
+So here we go! The way you validate those will depend on the framework you are using, since we are tapping directly into your framework's
 validation library.
 
 ### In Laravel
@@ -183,7 +190,7 @@ class MyController
 
 ### In Symfony
 
-... or in any project (since you can use the symfony/validator component)
+... or in any other framework (since you can use the symfony/validator component)
 
 ```php
 /**
@@ -463,7 +470,7 @@ enabled framework.
 
 ## What's next?
 
-v4 is a bug milestone, but there is still a lot of work to be done.
+v4 is a big milestone, but there is still a lot of work to be done.
 
 In the coming months we plan to: