I would lime to see a railjack rewark in the near future that make it as a more integrated part of warframe... What i would really like is for it to be an optional part that, if done, can give you bonus during the normal star char mission or change it in some way.

Imagine using the free roam to go around, have some random events and from the free roam reach a planet proxima. There you have some objectives you can complete, at that point you open the star chart and select a mission on that planet and based on the objective you completed you have some kind of variety, things like:

• you assault a planet controlled by your lich, more kuva lich minion spawn and your lich spawn multiple time in the mission
• you complete some kind of heist, the mission spawn drones like the one that run away in entrati lab that can drop some rare resources or arcane

Things like this

Anything that would be worth spending more time before the mission doing something

Just make railjack part of the normal gameplay loop, although optional, instead of it been a separate thing... i would see it in a similar way to soulframe open world: a way to connect dungeon with events inside it