Problem
#1874664: Reconcile "Edit" toolbar option with local tasks (tabs) and contextual links for editing introduces a great new integrated interaction model that needs more eyes to look at it, not only the few people who cared to work on it and iterate on several designs to completion.
Proposal
Do more user testing on the changes introduced in #1874664: Reconcile "Edit" toolbar option with local tasks (tabs) and contextual links for editing especially with other related changes proposed.