The story was a bit more kiddy than I'd prefer, but I recognize that I am perhaps not in the target audience for it, so that I can overlook. The characters got a lot more time to shine (and Farran's awkwardness was one of my favorite parts) and the story had a nice positive message to it, so that was very nice. Plus, most of the playsets got some screen time and were easily recognizable. (And there were even a few bits involving the characters building something, to go along with the Lego theme... even a hilarious bit where they build something upside-down.) Plus, there were plenty of callbacks to the previous episodes to better connect the world, like the treehouse and dragons and such. (Sadly, one of the characters who didn't return was Ragana, the evil elf from last year. Don't know how they could've fit her in, but some sort of reference or quick scene might've been nice.)
But the very best part was how they threw in random bricks in with all the fantastic scenery. Like, they're walking through the forest and there are just rock bricks scattered on the ground and stuff. It wasn't calling attention out to itself, but it didn't look out of place either and was a great connection to the Lego sets.
Anyway, it was an enjoyable series. Maybe not as good as some of the Ninjago seasons IMO, but better than Legends of Chima, with an artwork style that will appear to non Lego fans but enough tributes to the construction sets to entice the set's fans. All I know is that I have to pick up a few more of this year's Elves sets.