D2L has grade book notation features that outshine eCollege and Blackboard. The ability to leave notes to students, notes to self, and to time the release of grade view makes it more flexible than other cms systems.
Also useful is the 'impersonation feature' that lets you view the course from the p.o.v. of students.
Server overload at UW limits speed and produces errors. This erodes credibility. Still this is a university issue, not a d2l issue.
Work on getting custom configuration options for staff.
Global permissions enforced by computer services and supported by statements like " the majority of professors want it this way" are a serious limitation. If the majority of online teachers are dealing with undergraduates and using the system at an unsophisticated level, using their so called 'consensus' choices is the tail wagging the dog.
More later as the thoughts move me.