<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
Thanks for your inquiry. You are right, Aspose.Words cannot update TOC fields at the moment. The technical reason is that MS Word document is flow document and does not contain any information about its layout into lines and pages. So there is no way to determine where page starts or ends, but this information is necessary to build TOC.
At the moment, we already have our own rendering engine, which allow layout documents into pages and lines and currently we are working on TOC fields updating feature. It will be supported somewhere at the beginning of the next year.