I just sent an e-mail about this, but I thought I would post it here to get other people’s thoughts.
I use action groups extensively, and I find the highlighting in OF2 completely non-intuitive. Action groups that are empty (i.e., have no remaining sub-groups) are in dark black text, whereas action groups that have children (even available children) are greyed out.
This makes absolutely no sense to me. I have been trained through years of using OmniFocus 1 to interpret a greyed out action group to mean a group whose actions are not available (i.e., are either waiting or are deferred). Now, all of my action-group titles are greyed out, except for those that I care least about (i.e., those that don’t have any remaining tasks and are only being kept around because I anticipate additional tasks in the future). I get that some people treat an empty action group as an action in-and-of-itself (and therefore should not be greyed out), but that is not how I use them, and the new scheme leads to really odd emphasis.
I would urge that the behavior of OmniFocus 1 in this regard be restored, and that action group titles only be greyed-out if all of their remaining tasks are unavailable (i.e., either waiting or deferred).
Here is an example of some tasks in OmniFocus 1:
Here are the same tasks in OmniFocus 2:
