You guys realize that what you're asking for is - in the real world - highly dependent on the lens and its design, camera type, sensor etc? I'm not sure if it wouldn't just look artificially, small glares around highlights probably not but anything like larger flares wouldn't probably cut it. I guess it's better to leave that to the post production stage. Has something like this been done anywhere? And, most importantly, does it look convincing?
I'd ask for some lower hanging fruits like a more flexible bokeh setup with a rounding option, falloff, distortions and rotations close to the frame border.