We targeted an update for this month, but we hadn't had enough time yet, so it will be in August now. Look at the "Next Version" entry in the version history[heliumrain.gamepedia.com] for an idea of what's coming !

Soon.... <snooze>

did the final big update get pushed back again?

We're still working on it. The largest change in the update is a huge rework of the economy to solve many problems at the same time, including a new auto-trade feature for player-owned ships. This is taking time, and isn't close to release at the moment.