What was missing? I've only read book 6 once, so don't remember much about it.
Everything.
No no I'm seriouse, let me list them.
Dumbledore drops harry at the burrow, and then buggers off, he also drops harry in a river.
No mention is made of the worries of the wizarding world or inferi, no funny scene between molly and arthur.
No Owls reults
No mention of new minister for magic
No Dursleys
No Bill Weasly and the chick from book 4
Snape is made defence teacher, then ignored.
All the memories are gone except slughorn and the one with voldy in the childrens home
No mention of Sirius's will or harry getting the house.
No mention of Mundungus stealing items (aka the brooch)
No mention of Voldy's mother
No mention of the other Horcrux's, also Dumbledore seems to not have a clue until the very end.
No mention of Fenrir Grayback
Lupin and Tonks getting together is not even mentioned apart from some dodgy "darling" comment from tonks
Apparating lessons is out
End battle is gone
No repercussion for harry nearly killing Malfoy
No mention of bill getting hurt by Grayback
Dumbledores funeral is out
plus dozens of little things.
Yes I know these books way to damn well.