In response to your question, I went to the programmers and asked them why we are exporting things that will not be used in NV2. Here are the responses which answer your question:
1) Everything is exported so there is no chance of losing/leaving anything behind.
2) We need all the procedure settings from procedures like SETUPS, SETUP, Payroll procedures, etc..
3) 3rd Party procedures may have stored data in the notes/records views and if you write (or hire someone to write) scripts to do what the original procedure did, this information is accessable to you in NV2.
I hope this makes it more clear why we are exporting it all rather than being “selective”.