I'm returning to 4E after a long break and I'm also coming back as a DM after exams.
I'm running a campaign based on dungeon delving, however I'm still not used to Dungeons and one thing that comes to mind with 4E is how most of WOTC's material seems to be TOO MUCH battle oriented.
Tho I know 4E is an edition centered around combat (and that's why we like it), combats have the tendency to drag on for LONG, and some materials such as Dungeon Delve seem to absurdly make dungeons comprised of battle after battle after battle, making them just a series of encounters rather than dungeons.
However, there are adventures such as The Haunting of Kincep Mansion that seem to combine exploration with encounters, the same feeling I want to create with dungeons delves. HOWEVER I've noticed maps for adventures like those are usually large for having just a few encounters here and there, too large they seem like a hastle.
Since we're mostly gonna delve dungeons, I want to avoid having too many battles while also bringing interesting stuff into the dungeon and give them a reason to explore other than just killing the Solo Monster in the end.