There were so many things to like about the Manifest pilot. I agree the setup was a bit too much like "Lost". Still, where the show is heading is also very much like "Lost". I won't spoil any endings of the series simply because it hasn't happened yet. However, having the clock ticking down to 2024 is a fair bit of wishful thinking by the producers. I don't personally think that this series is good enough to last 5-6 seasons. If this series manages to get to 5 years, that will only be because the writers pulled a rabbit out of their collective hats and made it far better than it is now. Unlikely.
I was actually hoping for a different direction with this series. There were 191 passengers on 828, yet we're focusing on maybe 6 in total? Where are the other 185 passenger's stories? I was hoping that the writers would write it like a set of mini-series, focusing a few passenger's stories in each of those small sets. That way, we get a solid view of each passenger's story. Instead, we're stuck with a handful of dysfunctional characters who are, at times, tedious to watch... particularly Ben Stone and the Michaela and Jared on again, off again thread... and the "Jared goes bad" thread (where did this thread come from?)
I'm hoping that the second half of Season 2 improves. Otherwise, we may never know what happens to the passengers on June 2, 2024 because the series will never make it to 5 seasons.