For Enterprise/Ultimate customers using Revenue Line Items, it can be very slow to update the sales stages or expected close dates of all Revenue Line Items while viewing an Opportunity (especially if many RLIs are involved). It's great to be able to update them individually, but sometimes they all need to be updated at once.
RLIs can be mass updated in the RLI List View, but not in their subpanel view under Opportunities, Accounts.
Suggestion: enable mass updating of RLIs while viewing them in the subpanel under Opportunities, Accounts, etc. You are already able to select them all in these subpanels to delete, create quote, etc., but Mass Update is not an option that I see.