I still think it would be doable if done right. There are so many interesting elements of modern science and hard SF that could be included to introduce interesting game mechanics:

- adding various types of radiators (solid, droplet, etc.), gloving when weapons fire or engines activate, shooting them off prevents system from running

- planets on eccentric orbits with wildly varying surface conditions in mere days as the planet periodically get closer and farther to the star, from frozen solid to metals flowing like water days apart

- aerostat habitats in the atmosphere on gas giants or Venus like worlds, you could fly around but go to low (or get swept by a storm) and you might get crushed

- radiation belts, sun grazing comets or energy harvesting stations very close to a stellar body, can enter for a very limited time until even your shielded systems burn out - and good like with repair space walks!

- tidally locked bodies, where one side is always illuminated and the other one has an eternal night, with perhaps a thin habitable belt where conditions are just right for life, presenting interesting options for story telling and world building

Fun is of course subjective. Some of us care about realism more than others.