Why teach reorganisation first?

It is recommended that reorganisation be taught first.

Finding literal information is the most basic of the comprehension skills. Reorganisation deals with literal information which is scattered, and two or more pieces must be ‘found’ and put together. 

The other comprehension skills (inference, vocabulary, evaluation and reaction) all have an element of reorganisation to a greater or lesser degree.

Is it okay to bypass reorganisation and go to evaluation?

This is not advisable. 
It is always best to ensure that the skills of reorganisation and inference are well understood and used competently before embarking on evaluation. 

Evaluation is a combination of these two skills, and therefore requires more ‘reading between and beyond’ the lines. 

There are more questions that require an abstract answer in KEY into evaluation than there are in the other resources.  This can be difficult even for adult students.