Realtime GI, be it distance field based, LVP or any other solutions will be great, but meanwhile improving the workflow with reflection captures would be help in many cases.
I think sometimes people underestimate what would pass for alright faked GI. Probably many games would even pick a fake GI over the real one for performance reasons.
Because reflection captures are already there, plus lighting the diffuse from captures seems to be partially working or being work in progress (if I remember correctly there is a console variable to turn on diffuse from captures), reflection captures are rather good and probably easy to upgrade as a fake GI system.
It was already mentioned, but it would help if captures would be updated with:
- diffuse lighting and separate slider for specular and diffuse intensity
- some automated system for updating the captures over designer defined time, propagating from the area around the players character (time could range from seconds even to minutes)