I'm not on vacation right now. I'm just very busy traveling between customer onsite visits, customer meetings and workshops, internal and external workshops, testing sessions ... and so on ...
A lot of stuff has been stacked up in my inbox regarding changes in Oracle 12c, changed behavior - and thanks for your inputs. I will blog on it as soon as I have understood the issue and the solution - so plenty of stuff should come in the next weeks 
Just end of last week Roy and I uploaded a new version of our BIG slide deck - now having even more slides (but still not over 550) *haha*
Find them here - and as always - the change log at the end of the deck will explain what we've recently adjusted/added/altered.
Upgrade, Migrate and Consolidate to Oracle Database 12c
--Mike