I agree with you regard to 5e but i would just like to note that some people (like myself) really like the delve format and do not see as a reason for poor adventure design. I also disagree with 2 above.
The various 4e adventures I've bought have varied somewhat in how good and-or useful they are as adventures, but they've all suffered from some consistent flaws that I've come to realize are all format-based:
1. Too much emphasis on making each encounter or area its own set-piece without reference to other nearby things and how they might interact. Set-piece battles or encounters can be wonderful things, but that doesn't mean every battle has to be like that.
2. Encounter write-ups are too often either padded to fill the 2-page spread or edited to fit the 2-page spread harshly enough that required information is left out. At the same time, empty areas (where they occur, not often) aren't even mentioned half the time even if only to note they are empty.
3. As long as the overview map is clear and readable, there's usually no need for the blown-up map of the encounter area in the 2-page spread. If its only purpose is to tell me where the area occupants are, a few lines of text will do that and in much less space.
4. The overview map needs to be physically separate from the main booklet, so I can tack it to the back of my DM screen or - if the back is blank or has no adventure-related information on it - even use it *as* the DM screen if I don't have one. (in fairness, this problem goes all the way back to 2e; but it's still a problem, and bloody annoying)
5. The poster maps are great once the party has seen the entire area - but not before. Just plopping the poster map on the table when the party reach that encounter gives away *far* too much hidden information; and usually by the time the party has explored enough to make the poster map viable, they're well into the encounter and it's not worth disrupting everything to take up the minis, put the poster down, and put 'em all back.
Lan-"in 5e the entire campaign will be one great big encounter"-efan