Perhaps I am being naive here, but I do not think Brandon wants us to even remotely feel that Shallan is actually on a positive step to recovery. I think he wants us to feel that she thinks she is, but for us to know better. I think the year jump needs to happen because it will take time for Shallan to realize, "Oh hey, this felt ok for a while, but this is not sustainable." I think Wit knew the correct route to go for treatment, and Shallan has clearly twisted his words to take the easy way out.
We are coming into book 4 of 5. Just like Brandon tends to write his books in 5 parts, the first part of the series is in 5 parts, which means that its about time that stuff really goes to Braize in a handbasket. It's my opinion that book four is where stuff HAS to get worse before it gets better. The end of Book 3 is the perfect time for false hopes and happiness. I won't get into speculation about whether or not this will break Shallan and Adolin irreparably (because quite frankly I am of two minds about what I think will happen vs what I want to happen), but I will be severely shocked if it doesn't at least rock their marriage to their core. Adolin is absolutely enabling her and encouraging her on a wrong path. I think that can go down multiple plot possibilities (them realizing and working on appropriate treatment together, it ruining their marriage, we really have a lot of possibilities here).
Basically, @FuzzyWordsmith, I think Brandon wants us to feel ready to SCREAM at Shallan that this is NOT okay, and everything is so far from fine that fine isn't even visible. Book four is, in my opinion, going to be some seriously dark times all around, but I think Shallan is going to hit rock bottom. I can see some potentially dangerous gaps for those of us reading real time (in that we are vulnerable in the meantime while we wait for more books) and that does make me nervous for real people who potentially have this diagnosis. However, I have faith that Brandon is seriously considering how delicately he handles our several mental health situations and that when all is said and done, they will not imply unhealthy "treatments" over the course of the entire series. I strongly believe that Brandon agrees that what she is doing is the opposite of what she should be doing, and that will become apparent. I hope she will be able to fully reintegrate, but in the meantime, I think hard lessons about why this is not the appropriate treatment must be learned.