To put it bluntly, this didn't add up for what a premiere episode should entail. It's a problem NCIS: LA has always struggled with- that fine line of engaging plot, humor, and just enough character development.
Overall, I found the season premiere to be interesting, but I feel like they haven't really set up the season for new and interesting escapades other than Callen's hunt for Arkady and Deek's IAB investigation (which was only mentioned once).