I think WW can only do good things for you.
If you are considering joining meetings, they would be a great source of motivation for you. I take a lot of strength from my meetings each week. Everyone there is in the same place you are, facing the ups and downs of weight loss, and persevering with varying degrees of success. It's just good to get some human interaction on that front.
WW certainly wouldn't push anything counter-intuitive on you, nor would the program force you to relearn all the basics of healthy eating. I knew plenty about healthy eating before I re-joined WW this year, but I still needed the program as a guide and a source of accountability (because let's face it, you can lie on a message board but you can't lie to the lady reading the scales).
Some of the meetings are about encouraging people to move. Most of them, however, are about encouraging people to eat healthy and to really explore the reasons behind poor eating habits. To find and weed out the negative thinking that leads you to the bottom of a bag of chips. To find sources of inspiration and motivation within yourself. A lot of what goes on at least at my meeting is about the mental side of all this.
Congratulations on all of your successes so far! (Another reason to go to meetings: be an inspiration to others!!) Whether you decide to join WW or not, you are doing fantastic and things will pull together somehow.