It's pretty much what you describe in your favourite area.
You're right, it's close, but it's not as open (that's what I like) and someone could spawn in the tower behind you. They spawn in the lower corner too, but you can actually stand behind the spawn point. It's so much easier to see people coming because it's so open.
If you are allies, the L is awesome. Open gives the opponent more room to move. In the L building, you have space to move, the enemy doesn't.
I was talking about 1v1s 3d. I agree that when you have a group the L is better.