Yup, that's what I do. For example all LBC nationwide for 1kg is 150. This should be bearable, but there are two cases where the absence of regional settings will be an issue 1. For products 8kg and more, the difference between VizMin and LUzon is big, like 900 vs 1900 2. If you do motorcycle (grab, lalamove) delivery in Metro Manila, you can have a much lower rate, and have LBC for VizMin. Currently this is not possible.
I really hope they complete this functionality soon.