Anecdotal review: Been using it all morning. Had to switch back to 4. 5 has all of the problems that 2/3 had with ignoring any context, flagrantly ignoring the 'spirit' of my requests, and talking to me like I'm a little baby. Not to mention almost all of my prompts result in a several minute wait with "thinking longer about the answer".
Very stubborn and “opinionated”
I think most models will tend this way (to consolidate more control over how we “think” and what we believe)