One This Is Us Wedding and Three New Questions to Answer

I must say this year's season finale was definitely better than last years' show. Last year we found Jack and Rebecca embroiled in one of their biggest fights yet. This is where we, as the audience understand Rebecca wants more out of life and Jack wants her to acknowledge that he and the kids are enough. This leads to a temporary separation where Jack lives at Miguel's house for a while. This year, however, Rebecca is the first person we see in the beginning scene, walking down the aisle to her vow renewal with Jack for their forty year wedding anniversary. It's like it was meant to be. However, there is one person missing throughout all of it-- Toby! The groom for Kate's wedding is missing in all of her dreams of her parent's ceremony. Kate figures out she needs to "make room for Toby" in her life and let go of her dad's influence.
Personally, I found it a bit disturbing that Toby does not appear in any of her dreams. If she is getting married and the man she is supposed to marry isn't in any of the dreams about wedding, then what does that say about their relationship?

I love that we finally got a chance to learn a bit more about Toby's background with two divorced parents fighting over alimony payments and concerned about his health. Their concern does not go unfounded even with Toby's protests because in the final scene where Toby is struggling with depression again. The last sequence also reveals Kevin with new lady Zoe (Beth's cousin) on a plane visiting what we think is Vietnam, as well as Randall, aged about ten years, visiting Tess and asking her "You ready to see her?" with an uneasy Tess replying "I'm not ready yet."
So Fogleman and gang have presented us with three new questions to ask ourselves as we wait with great anticipation for next fall: Why is Kevin going to Vietnam? Who is the "she" Randall and Tess are going to see? and, why is Toby struggling with depression?  Feel free to comment below with your thoughts. I'd love to hear what you have to say. Here are my thoughts:
1) Tess is  going to see Beth who has recently split from Randall due to the tension of having Deja around.
2) Toby is struggling with depression because either their dog Audio died or they lost another baby.
3) Kevin is going with his new wife (yes, I said it) Zoe and they are going to Vietnam to visit a child his uncle had while he was at war, or visiting his uncle's tombstone.
It's questions like these where we come to love This Is Us more and more.
And in classic,  "worst case scenario" fashion for season three: "Fogleman never answers our questions and it becomes another show like Lost. Go!"