Dropping in with a comment that Leslie Sansone's older tapes (made before she became licensed to Goodtimes) are also great fun and you may even like them better, if you can find them. She's been around a long time and made many series of tapes, even two that incorporate jogging intervals. The production values of the older tapes vary, but I've been collecting them for years and I really enjoy them, some for their nostalgic value as well as the exercise. Some of her tapes are for seniors but are enjoyable even if one is not a senior; it's motivating to see older adults enjoying exercise and these are great "walks" for anyone. Another neat thing about Leslie "Walkaerobics" tapes is that they are easy to modify. You can make them more intense just by adding jogging intervals, doing them double time, etc.
BTW, the weighted balls are so light, they likely (IMO) pose no problem moving at the pace used on the WAP videos, but no one should do any kind of exercise routine without getting a doctor's ok. And, if using the balls seems uncomfortable or in any way wrong, IMO, you should just put them down.
Slimdown, I don't do WW but wouldn't you just count Leslie as aerobics or walking and gauge the intensity by how hard you perceive yourself to be working? Dunno.
Happy walking!