[mjw]

One particular thing which bothers me about controllers is the way they lump together obviously class- or collection-level methods (index, create, ...) with instance-level methods (show, update, delete, ...).

IMO requests should be routed to an instance representing a particular resource; the methods on that resource should correspond directly to the HTTP request methods. The collection (or the class) is a separate resource.

[dkubb]

Agreed. I always thought that Rails controllers violated the Single Responsibility Principle (http://en.wikipedia.org/wiki/Single_responsibility_principle) by mixing collection and member concerns into a single class.