A question for you: how do you teach beginners to give a "high quality, spontaneous attack"? It seems to me that the ability to attack well follows the ability to fall well.
Drew, did you mean "one should have the skills to fall properly before one should have the skills to attack properly"? I think this matter is upmost important. If uke does not have this pre-requisite it is a recipe for disaster.
I remember my Judo teacher replying to a question fput forth by a student.
Student: "What is the most important technique in Judo?"
Judo Teacher: "How to fall properly (ukemi) technique".