My 2 cents on this subject....
This is from someone that has made his fair share of "connected box" maps.
In fact I can only think of four maps i've done, or am doing, that aren't based off connected boxes, chilidogs, darkages, an unreleased map, and a new in progress map.
I think the problem is that these new mappers are influenced by the indunes, pbcups, pwas, and airtimes that are out there.
We should really try to create amazing creations. Look at some of the more elaborate designs. Look at brainstorm, for instance. You may not like that map, but it's design is unique and not a box. It has cool sewer tunnels. Take example from the odd, non boxy, creation. Siege Castle is a great example. You don't have to copy, just draw influence.
Spydie that map, to me, is 100 other maps in DP. Square, flat, boring. I have a directory full of maps i've spent hours upon hours on that have never made it to the public. It's ok to learn. You don't have to release everything you work on.
I should release all my .map files so others can learn from them. Not just my released maps, but all my test maps.
I think all mappers should release thier .map files. Maybe if people wouldn't rip maps off it would happen more.
Seriously though. Don't be afraid to build, tear apart, throw away, rebuild. Place a high expectation on yourself to produce something awe-inspiring.
peace