- Lazy loading of types without separate build step (see #69, see [docs](http://webonyx.github.io/graphql-php/type-system/schema/#lazy-loading-of-types))
- PSR-7 compliant Standard Server (see [docs](http://webonyx.github.io/graphql-php/executing-queries/#using-server))
- New default error formatting, which does not expose sensitive data (see [docs](http://webonyx.github.io/graphql-php/error-handling/))
- Ability to define custom error handler to filter/log/re-throw exceptions after execution (see [docs](http://webonyx.github.io/graphql-php/error-handling/#custom-error-handling-and-formatting))
- Allow defining schema configuration using objects with fluent setters vs array (see [docs](http://webonyx.github.io/graphql-php/type-system/schema/#using-config-class))
- Allow serializing AST to array and re-creating AST from array lazily (see [docs](http://webonyx.github.io/graphql-php/reference/#graphqlutilsast))
- [Apollo-style](https://dev-blog.apollodata.com/query-batching-in-apollo-63acfd859862) query batching support via server (see [docs](http://webonyx.github.io/graphql-php/executing-queries/#query-batching))
- Schema validation, including validation of interface implementations (see [docs](http://webonyx.github.io/graphql-php/type-system/schema/#schema-validation))
- Ability to pass custom config formatter when defining schema using [GraphQL type language](http://graphql.org/learn/schema/#type-language) (see [docs](http://webonyx.github.io/graphql-php/type-system/type-language/))