Add flight through gas giant atmospheres (not landing). Add missions rewarding exploration progress and significant payouts that require you deploy a limpet or use a scanner or similar while inside the cloud. Make it so you take damage / hazard while you are in the cloud, so it would require a different type of exploration build (stronger shields / hull / repair ability / speed)
You could probably reuse a lot of the Titan Maelstorm mechanics and get pretty close.
You could probably reuse a lot of the Titan Maelstorm mechanics and get pretty close.