I found the missions themselves to be quality but too long for my taste, especially if you're expected to play them more than once. I'm also disappointed that I took a year off and came back and the story was just wrapping up, it's taking too long to make these missions and story arcs.
I think the length was a key issue here in regards to wanting to revisit them. I played through each mission once on either day 1 or 2 of the event and didn't revisit them until I started this article. As I said in the article they are all enjoyable on there own but not so much as an easily replay-able storyline. As for how long stuff takes to release I can't really comment on it as this is the first storyline I have been active for the entirety of it but I don't mind it too much.