diff --git a/src/client/rest/RequestHandlers/Sequential.js b/src/client/rest/RequestHandlers/Sequential.js
index 9ba3c9ebb..00b713683 100644
--- a/src/client/rest/RequestHandlers/Sequential.js
+++ b/src/client/rest/RequestHandlers/Sequential.js
@@ -65,7 +65,7 @@ class SequentialRequestHandler extends RequestHandler {
             }, Number(res.headers['retry-after']) + this.restManager.client.options.restTimeOffset);
             if (res.headers['x-ratelimit-global']) this.globalLimit = true;
           } else {
-            item.reject(err.status === 400 ? new DiscordAPIError(res.body) : err);
+            item.reject(err.status >= 400 && err.status < 500 ? new DiscordAPIError(res.body) : err);
             resolve(err);
           }
         } else {
diff --git a/src/structures/GuildMember.js b/src/structures/GuildMember.js
index 3785290eb..b4fa2fcda 100644
--- a/src/structures/GuildMember.js
+++ b/src/structures/GuildMember.js
@@ -3,6 +3,7 @@ const Role = require('./Role');
 const Permissions = require('../util/Permissions');
 const Collection = require('../util/Collection');
 const Presence = require('./Presence').Presence;
+const util = require('util');
 
 /**
  * Represents a member of a guild on Discord
@@ -513,4 +514,7 @@ class GuildMember {
 
 TextBasedChannel.applyToClass(GuildMember);
 
+GuildMember.prototype.hasPermissions = util.deprecate(GuildMember.prototype.hasPermissions,
+  'GuildMember#hasPermissions is deprecated - use GuildMember#hasPermission, it now takes an array');
+
 module.exports = GuildMember;
diff --git a/src/structures/MessageCollector.js b/src/structures/MessageCollector.js
index 8e96187cf..566fb9dbd 100644
--- a/src/structures/MessageCollector.js
+++ b/src/structures/MessageCollector.js
@@ -1,4 +1,5 @@
 const Collector = require('./interfaces/Collector');
+const util = require('util');
 
 /**
  * @typedef {CollectorOptions} MessageCollectorOptions
@@ -50,6 +51,14 @@ class MessageCollector extends Collector {
     this.on('collect', this._reEmitter);
   }
 
+  // TODO: Remove me in v12
+  on(eventName, listener) {
+    if (eventName === 'message') {
+      listener = util.deprecate(listener, 'MessageCollector will soon no longer emit "message", use "collect" instead');
+    }
+    super.on(eventName, listener);
+  }
+
   /**
    * Handle an incoming message for possible collection.
    * @param {Message} message The message that could be collected.
diff --git a/src/structures/Role.js b/src/structures/Role.js
index eb6228a34..4c221bd7d 100644
--- a/src/structures/Role.js
+++ b/src/structures/Role.js
@@ -1,5 +1,6 @@
 const Snowflake = require('../util/Snowflake');
 const Permissions = require('../util/Permissions');
+const util = require('util');
 
 /**
  * Represents a role on Discord
@@ -350,4 +351,8 @@ class Role {
   }
 }
 
+Role.prototype.hasPermissions = util
+  .deprecate(Role.prototype.hasPermissions,
+    'Role#hasPermissions is deprecated - use Role#hasPermission instead, it now takes an array');
+
 module.exports = Role;
diff --git a/src/util/Permissions.js b/src/util/Permissions.js
index bbc4e4d77..2e469abf5 100644
--- a/src/util/Permissions.js
+++ b/src/util/Permissions.js
@@ -1,4 +1,5 @@
 const Constants = require('../util/Constants');
+const util = require('util');
 
 /**
  * Data structure that makes it easy to interact with a permission bitfield. All {@link GuildMember}s have a set of
@@ -18,7 +19,7 @@ class Permissions {
      * @type {GuildMember}
      * @deprecated
      */
-    this.member = typeof member === 'object' ? member : null;
+    this._member = typeof member === 'object' ? member : null;
 
     /**
      * Bitfield of the packed permissions
@@ -27,6 +28,14 @@ class Permissions {
     this.bitfield = typeof permissions === 'number' ? permissions : this.constructor.resolve(permissions);
   }
 
+  get member() {
+    return this._member;
+  }
+
+  set member(value) {
+    this._member = value;
+  }
+
   /**
    * Bitfield of the packed permissions
    * @type {number}
@@ -249,4 +258,16 @@ Permissions.DEFAULT = 104324097;
  * @deprecated
  */
 
+Permissions.prototype.hasPermission = util.deprecate(Permissions.prototype.hasPermission,
+  'EvaluatedPermissions#hasPermission is deprecated, use Permissions#has instead');
+Permissions.prototype.hasPermissions = util.deprecate(Permissions.prototype.hasPermissions,
+  'EvaluatedPermissions#hasPermissions is deprecated, use Permissions#has instead');
+Permissions.prototype.missingPermissions = util.deprecate(Permissions.prototype.missingPermissions,
+  'EvaluatedPermissions#missingPermissions is deprecated, use Permissions#missing instead');
+Object.defineProperty(Permissions.prototype, 'member', {
+  get: util
+        .deprecate(Object.getOwnPropertyDescriptor(Permissions.prototype, 'member').get,
+        'EvaluatedPermissions#member is deprecated'),
+});
+
 module.exports = Permissions;