Sorry in advance, as this really isn't going to answer your question, as I've only been doing Points Plus for about three weeks....
BUT...
Have you read the sticky post on plateaus? I did this morning and it had some great insight and ideas. The strategy mentioned there that I'm going to try when I plateau is to actively try to maintain weight at that plateau for 3-4 weeks by switching my points to maintenance mode. (I know...weird, right?!) Then, when I'm ready to lose again, I'm going to switch the points back to lose mode. Giving yourself a "rest" during that plateau allow you to practice at maintaining while getting your body adjusted to your new weight. As an added bonus, it will probably allow you to lose weight more easily when you start it back up again in weight-loss mode. Reading that sticky post was such a lightbulb moment for me - every other time I've gone into a plateau, I give up and ruin everything I've worked for.
Anyway, I'm not trying to discourage you from switching, as it seems there have been other people who have switched to other WW formulas successfully, but if you like the program you're on, then I say try going into maintenance for a while. Personally, I like the PP plan so much that I would have a hard time switching.
Anyway, whatever you decide, good luck!!