Being an Arduino noob, my opinion and 50 cents together won't even buy a soda but I'm going to express it anyway!
I tend to agree with the OP. Some sort of tool is needed to better navigate medium to large sketches. The evolution of Arduino compatible processors will handle larger and larger programs (now up to 128k with the Mega, soon to be 256k), a sketch can become quite long. I have resorted to placing multiple commands on a single line in order to shorten the overall length of the sketch. Most code structure nazis cringe at the thought of this, I'm sure, but it has become a necessary evil to me.
Thanks for listening,
Billy