I like the idea of a more sandbox AL module, but this one doesn't work upon execution. On the surface, it seems like the players can go wherever they want and gather clues in any order, but they will never meet the objectives unless they actually follow the map. There's even a Deus Ex Machina scenario if the players happen to lose the map.
The plot is also non-sensical: Bregan D'aerthe wants the PCs to fight the Baron of Blood, so they sprinkle clues everywhere as to where he can be found, instead of just giving them the map directly to his location. How did Bregan D'aerthe get those clues into the locations? Seems like a lot of risk for a convoluted plan. The second clue location can be a boring time sink unless helped a good deal by the DM.
My players didn't hate it, but they didn't love it, either. This adventure is better run in a quiet place and requires more than usual DM prep time for an AL module.