One problem with the warning messages that you get during export, is that if you don't turn on 'full log' you don't know the name of the material/object that is erroring. It would be easier for me to troubleshoot issues in the scene if the warnings that appear when 'full log' is disabled would show that information. Because while you do get the information when 'full log' is enabled, you also now have to scroll through the entire list of everything that didn't error as well, to find the items that did. On big scenes, this is a headache.