This is a real disappointment. While i support advancing the technology, visio online is not ready for prime time. Just a couple of issues i've encountered with Visio Online thus far, which are not present in Visio Web Access:
- There is an undocumented limit on the length of a externally linked data fields on shapes of 250 characters. This results in the timeout of Refreshing External Data on the Visio Online Document. Visio Web Access has no such issue.
- Linking of shapes between pages is very hit or miss in visio online. Especially if the link is located in the template.
Microsoft