Yes, there are lots of rumors. I'd suggest that you go back into the history of the rumors about the recent changes that
DVC made, before they pulled the trigger. I found references to potential resale changes that went years back. When they finally made the change to exclude the parts that they did, most people reacted that it wasn't as bad as expected.
In my opinion, DVC has done what they are going to do, and I wouldn't expect additional changes coming in the near future. If they do, I would anticipate that it wouldn't affect you as you would probably be grandfathered in like they did this time. This is only my opinion (and don't trust me, I still have faith in the Detroit Lions).
Understand what you are buying. If you buy DVC points into a resale resort (such as VB), they could revoke all of your privledges other than your right to stay at Vero Beach. That is the only thing that is guaranteed, everything else is just perks that they can take away whenever they want. I wouldn't buy in unless you are comfortable that they could do that at some point. If you're doing it to stay in Disneyworld, you might want to think about similar properties "in the World". OKW is priced good (and better maint fees). We went with SSR balancing price/point with good maint fees, and a longer contract.
DVC is one of the best rated "Timeshare" companies, and further pulling of perks is only going to hurt them (and their value). I think that we've seen what they plan to do. The real issue was that when someone asked the Disney reps why they should buy direct vs. resale, that they didn't have a good answer. At least now, they can say that you get more buying direct (even though the majority of us would not use those perks).
The only other concern I would have is if you plan to always travel at peak times (Christmas, Easter, ...). Getting resorts in the world at those times could be tough. Other than that, you'll be fine to get good spots at 7 months.
I'd still pull the trigger. I think that it would be a huge surprise if they pulled back perks enough that we couldn't stay at other DVC properties. Worst case in my mind would be that it would be a change similar to the last change where it wouldn't affect you, as they would grandfather you in if you bought now.
Good Luck!