Activity completion expected date option as days after enrollment

would like to see the activity completion rule extended on the 'Expect completed on' value to include an option to include either the date OR a "days after enrolment".

in the situation where there is continuous enrolment (such as a RTO, where people pay and enrol any time during the year) it would be nice to be able to specify that an activity is expected for completion so many days after the student takes the course (e.g. 7, 30, 45).

This data could then inform a calendar or other block to show predicted fall dates for these activities which would be offset in days from their enrolment start date in that program/course/serial/whatever you call it. this could therefore show how quickly the learner is expected to progress through the course (or the suggested timeframes, at any rate). It would also be useful data in establishing learning plans, particular if enrolled in multiple courses.