I agree that it may be usefull for your point 1. I disagree with point 2.

My job is development as well as maintenance. The percentage of each one varies form 50-50 to 90-10. But I don't see any way to measure the maintenance using LOC. This month I fixed 2 bugs to an old project. I added about 20 lines of code and modified about 10. It took me almost 2 days. The previous maintenance of the same project involved about 70 new lines of code, more than 400 changed. All this for about 4 hours. IMHO, LOC doesn't apply here.

Vlad