It's not hard to see how Julie and Matt may end up being a similar couple to Eric and Tami. The personalities in the four do differ, but facing trials and finding undying devotion is present in both instances. Eric and Tami are better people than Julie, but she is still a kid in many ways, and still has a lot to learn. Not the best written character on the series, it's still gratifying to see the Taylor daughter find such a romantic notion as the series comes to a close. And Matt does deserve her. In time, Eric will appreciate his son-in-law in time, whom he already cares for, but stumbles upon the shifting roles.
Besides the Taylor family, many other characters come through Friday Night Lights over the years. Most get satisfying endings, whether they happen in earlier seasons, or in "Always." Landry (Jesse Plemons) and Grandma Saracen (Louanne Stephens) are two characters that are brought back, but do not get focus, in the final episode. Both are shown in brief scenes, typical for their characters, but not particularly special. Which is OK. As mentioned above, the show only covers a period in the lives of the characters. It isn't time for something large to happen to either of them, so the writers don't force it. But they are involved with characters who do need them, so they are present. Buddy (Brad Leland) is along those same lines, but with a bit extra screen time.
Hastings (Grey Damon) alone gets no closure. Perhaps he has the unfortunate luck of joining the cast too late in the game, and disappears into the background almost as soon as he appears on the show. It seems likely, had the series not been ending, Hastings would get more to do. With other loose ends to tie up, he gets the short end of the stick.
The final season of Friday Night Lights develops Mindy (Stacey Oristano) far better than any previous year. Her relationship with Becky (Madison Burge) is sweet and lasting. Even though Becky's mom (Alicia Witt) returns in "Always," and Becky moves home, Mindy and Becky's relationship cannot suffer. They are family, as sure as any blood relation. Thank goodness, for Mindy's sake, the young woman comes along, so that a long-time supporting player finally gets her due.