I have no idea who Denise's contact is - and I'm not asking - but I'd be very surprised to find it's a low-level salesperson or manager. Marriott doesn't easily give up information for public consumption and anyone in the org who decides to do it for themselves is pretty much gone immediately. IMO the info that Denise is sharing is too advanced to be coming from Sales unless it's at the executive level and in conjunction with the product development higher-ups.
Vistana people are lucky to have this contact and to have Denise working with him/her! Marriott people didn't have that until our moderator, DaveM, was able to develop it after the DC rollout - we were hit with this huge shift from Weeks to Points overnight, BAM!, after YEARS of sales speculation and threats, a great deal of which never came to fruition. Enjoy your "soft rollout" period, use it to your advantage to learn as much as you can, and thank Denise every day that she cultivated this contact whoever it is.
And whatever else you do, keep an open mind and listen to your fellow Vistana TUGgers who join whatever this new thing is and then generously share their experience with it. The overall tenor on the TUG Marriott forum at the DC rollout was negative. I mean, very negative! Over the years that's changed and we who are enthusiastic members of the Destination Club have many different reasons why. It has its negatives, of course, but for many of us it's not at all the money-sucking too-confusing worthless scheme that was predicted by many at the outset to fail spectacularly.
Good luck!