If the goal is to clear VCIX-NV , I would say - Do plenty of labs . I don't stick to reading too much while trying for a lab exam unless document clarifies some doubts. Exam tests you on deployment, administration, optimization, and troubleshooting . Yes, success criteria is not based on design . First and foremost be familiar with blue print ,it is your cheat sheet -> https://mylearn.vmware.com/lcms/web/portals/certification/VCIX_Blueprints/VCIX-NV-Exam-Blueprint-Guide-v1_7.pdf . If need, you can enroll for troubleshooting ICM ->VMware Lab Connect
There are plenty of blogs on VCIX-NV study guides (Google is your friend ) and do leverage VMware HOL labs if you have problem/resource constraints to set up a lab->VMware Learning Platform . Good luck with the preparation .
as list check the blueprint that is the key, but manly play with HOLS in there you can destroy or inspect or dissect NSX it is a real NSX deployment and environment so you can see what happens if you disconnect things or delete things or deploy one object, etc.