My take on the new format (I'm using Explorers Handbook, which is newer but might have subtle differences)
Name
Kinda useful to know ;-)
Becoming a X
This just tells you the fastest way to get into X class. This could be trimmed down.
Entry Requirements
useful
Class Features
meat and potatoes
Ye Old Chart
useful
Playing an X
This should be an collection of all the below, as relevant
Combat
perhaps a note on this, but not a whole section
Advancement
tie this into the becoming a X section
Resources
Tie to organizations, below
X in the world
DM info. Nice. Keep KISS but useful
Organizations
If there is an organizations, include. Else...
NPC reactions
not important. Remove
X Lore
Ugh. Dump.
X in the Game
This should be rolled into X in the world
Adaption
Keep. Best thing added since CW
Encounters
Useless.
Sample X
Occasionally useful for seeing a build idea, but ultimately useless