What I want is to be able to get self contained modules on the scale of LMoP that are good for 3-5 sessions and that I can slide into my current campaign. Neither the massive adventure paths nor the AL stuff fits my need.
I mostly agree. I do recognize however that such a thing is hard to make for Wizards - they've said they want each release to be an Event, plus there's the whole issue of format. A hardback has an actual spine which shows up better in a game store, and feels more "deluxe". There's also the issue of cost - Paizo charges $25 for a 64-page module (same size as Lost Mines of Phandelver), and I seriously doubt Wizards would charge less than $30 (their books are generally more expensive than an equal-size Pathfinder book), more likely $35. $30-35 for a 64 page book compared to $50 for a 256-page book doesn't sound like such a good deal.
What might work is an anthology book with 4-8 short adventures. Ideally, they would be playable as stand-alone adventures, but each would have some connections to the next without having an over-arching plot - perhaps adventure 1 has a map that leads to adventure 2, but the plot of adventure 1 is self-contained. I'm thinking linkage on the level of the original 3.0 adventures starting with the Sunless Citadel - you had some recurring mentions of the vampire Gulthias and the dragon Ashardalon, but each adventure stood on its own two feet.