No, this is an implementation of the Command Pattern for MVC. It doesn't eschew standard MVC separation, rather it strengthens it by removing domain/business logic into so called "Commands" and keeping it out of the other tiers.
This Backbone+Marionette/Geppetto thing reminds me a lot of RobotLegs, which ASFAIK is one of the most well engineered and well loved AS3 MVC+Command micro frameworks. It's worth a look.
http://en.wikipedia.org/wiki/Command_pattern
http://www.codeproject.com/Articles/12263/The-Command-Patter...
This Backbone+Marionette/Geppetto thing reminds me a lot of RobotLegs, which ASFAIK is one of the most well engineered and well loved AS3 MVC+Command micro frameworks. It's worth a look.
http://www.robotlegs.org/