New Camera; New Year

... new lease of Blip life?
The reliable 5D Mk II is gone.  Traded in for a much more modern 6D.  I can't justify the vastly increased price for my desired 5D Mk III  Will I regret it?
I let the kids annoy people and run off steam at the Arts Centre.  Sorry to anybody who wasn't expecting extremely active kids, but it was raining and I had no choice!