We've had a lot of comments from people hoping for a Duggar/Bates engagement sometime soon. I will be the first to admit that I having been hoping for that for a season or two. Here is why I don't think that's going to happen any time soon.
The more I rewatch episodes from Season 4 and as I just watched the first two episodes of Season 5, I realize that there probably isn't anything serious going on between Jana or John-David and any of the Bates. Think back to when you were 20. Now compound that with the upbringing the Duggar and Bates kids have had. If you finally found the one person you were sure you were meant to be with for the rest of your life, would you be able to stand being away from them for such periods of time? Maybe you would, maybe you've learned a life of self-sacrifice in service for others. But you're also human. You feel.
I can't stop thinking about how Josh acted after he'd realized that Anna was his true love. He was basically useless in Arkansas. He visited Florida every chance he could. The Kellars came to Arkansas any chance they could. It was all about Josh and Anna and courtship. While the Duggars and the Bates have gotten together more often in the past 3-4 years than they have in the previous 15, the Duggar's move to Little Rock and the reason behind it all but stopped those visits. I believe in Season 4 (and I could be wrong, so please correct me) the families only got together once, maybe twice. Once that I can remember--when the Bates came to visit and see Josie in the hospital. Yes Jana looked a little, overcome, as she blushed everytime Zack (isn't that the oldest Bates?) was nearby, but that doesn't mean much.
Would going to Asia for 2 months be something you would actively seek out if you were head over heels the way Josh and Anna were? Again, yes you might, after all high school sweethearts go to different colleges all the time, but I really have to wonder.
I seriously believe that Jana, at least, since the trip was her idea, is taking things slow. I think she's seriously deciding what she wants to do with her life and actively seeking out experiences that will expand her horizons.
John-David, while not as vocal, seems to be leading quite a fulfilling life as well. I'd heard before that he was a volunteer fireman, but this was the first time in my memory that they've shown him in that role. That experience will definately teach him a lot and "grow him up." I do remember that a few of the Bates kids are also volunteer firemen--isn't one of the girls? Michaela?
While Josh was running his own business before he became engaged to Anna, I think that Jana and John-David are going a bit above and beyond the example that Josh set for them. I think that's good for them. I think that it's quite likely that we might see Jana in some kind of school atmosphere before we see her engaged. John-David? Perhaps he will head down the matrimony path first.