I agree with your points. The first job has gone nowhere, and at this point would need too many resources (development time, and in-game time) to justify its continuation in this crowded field. I had actually forgotten all about the guys from the museum- they could easily just never be addressed again and I don't think anyone would care. The second job seems too fresh to cut already, but it was probably a mistake to introduce it. It could have been the 1st (and only) job, and we would have had a couple of opportunities to develop it already. (Am I correct that the 2nd job has only made one appearance so far?) I also wonder about the Morello storyline, because it seems like it's going to be a big one and need a lot of room for growth. I'm not sure I would cut it, but by itself it could be the main plot of most games so to make it another additional storyline seems like a big undertaking. I didn't dislike the Bennett story, but it did feel redundant if you were also doing Aiden's story. But if you're going to make cuts, at some point you're going to have to make some tough decisions.
L&P seems like a person with a vision, and I think that's great, but I think he could really use the help of a collaborator. Someone that could act as an editor to his many ideas, shaping and adjusting them to fit their capacity. Few games have this many characters and permutations for romance. Even fewer maintain the quality of L&P's work. And none do all of that while on a one-person team. L&P has made it very clear that he won't/can't bring in another person, and I can understand the hesitation. But if that's the case then something needs to give, and it's going to end up being some of the superfluous storylines.
As for Aiden's next couple of tasks, if they really are just selfies then that storyline really does need to pick up the pace. It may not be realistic, but we're running out of time and after all this time a simple selfie of Sophia's cleavage is underwhelming to the audience and uninteresting to the story.