Well, you could create calculated columns in your list. These calculated columns would data from eac XML column, so, using this formula:
=MID([Method], FIND(">", [Method], 1)-1, FIND("<", [Method], 1)-1)
In this way, you could get the text between tags, because MID function combined with FIND could get the text between tags. In that example you would get the text from <Method> tag.
So, once you have the correct text en each calculated column, you can create a view in that list with these calculated columns, and when you export you will see the correct columns in the Excel.