Do defenders win if attacker doesn't take objective in attacker/defender mission?
Yes, that hasn't changed.
My other complaint is why three books? The MW book is hardcover, the EW/LW book and special rules supplement are softcover, but this all could have been in one book. Instead they print two separate books with the same game mechanics, but the EW/LW book just adds sections on how to convert existing lists to the new format to work within the new rules. And the extra special rules and Warriors book is a small booklet. This could have been better as a larger softcover book for ease of read, and just one rulebook for everything. This is going to make list building extremely annoying for awhile as you have to flip through multiple books to make sure everything is correct when you write/type up a list. Forces of War will be totally useless until they convert the stats over for the new setup.
This, I suspect is going to be a major sore point for tournament players for awhile.