That's the thing I bought the season pass too based off their past DLC work on FO3, NV and Skyrim, I didn't see that there was any possible way I wouldn't get full value. Then we get something like the Vault DLC that has a storyline that lasts literally 20 minutes, and 19 of that is just waiting for your dweller to complete an experiment. And then it was just over. There is more depth to a side quest in Fallout 3.
You're not alone on that, when I think back to Fallout 3 or New Vegas they are on another level. So much more content and things to do, far more engaging quests and side quests. I can think back to Fallout 3 and have good feeling memories of a lot of quests - first time in Megaton, Rivet City, helping that kid Bryan Wilkes, slaving missions, the kid towns, that town of murderers, etc. New Vegas think back to the first run in with the Legion or that super mutant that helps you out, the gambling on and on...
Fallout 4 I look back at now and there's certainly some good things, it is a Fallout game, it looked great, I liked the voiced characters and character creation, first time I stepped foot in Diamond City I was like "Oh man here we go"... Can't even remember if I had a favourite quest in this game, only one that stands out while I write this is the Silver Shroud one.
Hate to be in the Obsidian group or anything like that because I still loved the game, and I think Fallout 3 was better than New Vegas, but I would love to see what Obsidian could do with the new tools of Fallout 4. Give them another shot Bethesda and I'll forgive the DLC rip off.