We are currently on the Voyager and the Venice to Rome and then Rome to Monte Carlo have been "summit cruises". The executives on board are very accessible. There has been a "public" town meeting, and then the Platinum/Titanium members met with Ken, Andre, etc. for about 1.5 hours.
While they do have some specific questions, they also give you lots of time to talk to them whether it is positive or a suggestion.
They are also very visible around the ship so chatting with them is very easy to do. You will enjoy sailing with them.
Jan