We started with a Wyndham Discovery plan many years ago. Then we bought resale, then we bought retail. VIPP with PICS, today. The advantage to having the Discovery program is that you really get to learn all about how Wyndham works at a relatively low price, via your own personal account. You can read and you can rent, but, the only way to see if TS life is for you is to manage it and live it for a couple of years. 400K is a nice sum of points, 2 to 4 weeks of vacation depending on where you go, when you go, and the size of units being reserved.
If after getting feedback on pros/cons of Discovery you are overly concerned or confused, rescind. It's not a bad program, IMHO.