I don't know that they care that much. There are lots of ways that they could degrade resale other than the oft-repeated (from salespeople) threat of removing 13-month access, and they really haven't - at least not for resale-only owners. (Of course, they prevented VIPs from getting extra benefits on their resale points a few years ago, but that just places VIPs' resale points at the same level as resale owners have always been.)
It appears to me that most of the major changes Wyndham has made in the past 5-10 years or so have fallen into three general buckets: trying to thwart the private rental market, "simplifying," and pushing people online (vs. calling). (To me, "simplifying" includes replacing the credit pool with points deposit, as well as the new housekeeping credit structure.) I haven't seen anything that really targets resale owners.
Edit: Okay, one thing - increasing the transfer fee. When I first purchased in 2010 it was $99, but it soon increased to $299, and just recently to $399. But over 14 years, and especially like 12 years holding at $299 before increasing to $399, I'm not sure how unreasonable that is.