Cannot approve by email after recent update

I believe this may be linked to the fact that on Change Requests, the "Approve" buttons have been removed from the "Process" tab and now only appear on the "Tasks" tab. This has been raised via Support and I'm hoping to hear something back soon.

This is actually a breaking change too, because previously non-task users could handle approvals through these links. A large portion of our approver base now can't do approvals and I'm having to make large changes to the existing roles as a result

I had a session with the Product Management team.  They are working on rolling back this feature for the customers that don't need it early next week.  Please make sure you escalate this to your account manager if you would like this rolled back for you, too.

Interesting that it's possible to roll it back on a per-account basis... what was the change they made?