[corford]

I'm sorry but [0] and [1] are complete non-issues and I'm not sure I fully understand your point with [3].

The code is very far from terrible. Go look at Marionette's source on github - you'll find it's extremely easy to understand and reason about. Now try and do the same with Angular or Ember...

[Rygu]

How are [0] and [1] non-issues? I like my libraries "SOLID" and "Clean" (look em up). I have worked with Marionette's source, and it's neither.

Point [2] means, to use a different renderer you need to replace Marionette's internal renderer completely like it's a global (globals are bad).

[Bahamut]

Angular's source is pretty clean, minus compile.js and select.js