Adding wireframes might be doable but an on-the-fly placement of 3D objects, displaying in real-time might be too resource intensive for many users.

A side view of these huge maps would not be optimal either - it would need to be isometric but that only does so much.

Honestly, 2D is great for getting a simple idea of where things are and then checking them out (by moving the spawn point) is how you verify.

Doing this, I have:

• Placed guards in guard towers
• Placed NPCs in XL compounds
• Ensured Objects are below the terrain on unlevel terrain (i.e. nothing floating) etc.