If enough people can submit the feature request to have the quantity break and price columns supported in an excel spreadsheet then I wouldnt even need to have this done!
But until that happens, This will be the only efficent way to update the quantity breaks and prices. I am going through now and starting to create the spreadsheet according to how the sql table is setup. It will probably take me a few days to do so because we have 300+ products x 3-5 quantity/price breaks per product and have never had this formally listed somewhere.
This will make it at least a little easier when we go through and start doing price increases :-P