I am opening this new discussion further to the problem described in this discussion: Moving on to next section.
1.- As far as I know, the Lesson activity was the first Moodle activity to have a "prerequisite" feature. See Lesson_settings#Prerequisite_lesson. This features makes access to a Lesson B dependent on another lesson (e.g.) Lesson A, according to 3 criteria:
a. Time spent (in Lesson A) : number of minutes
b. Lesson A completed
c. Minimum Grade obtained in Lesson A (in %).
2.- Starting with Moodle 2, the Conditional activities feature was introduced along with the Activity completion feature. This dual way of making access to a Lesson instance dependant upon completion etc. of another instance makes things unnecessarily complicated and leads to confusion. Therefore I would like to create an issue in the Moodle Tracker to ask for the removal of the Prerequisite feature from the Lesson activity.
3.- However, there is one criteria in the Lesson Prerequisite feature that is not currently available in the Conditional activities feature: time spent on the previous activity (lesson). Is this criteria actually used by Lesson users (teachers)? If so, and if people think it is worth retaining, I see 2 possibilities:
a. Rework the Lesson Prerequisite to contain only the Time spent feature.
b. Add a Time spent in activity conditional access criteria to the existing Conditional activities feature, in a future Moodle version (2.8 or higher).
What to Lesson users think? I'd be especially interested to know if anyone is actually using the Prerequisite "Time spent" feature, and whether they think it is important to them.