I often have to shoot in very crappy lighting. I shoot raw with high ISO cameras and am amble to pull lots of detail our of shadows using LR.
I'm not an experienced user of PS. I only use it for touching up eyes and skin for headshots.
Often I have a photograph where the light is good on one person in the frame, but very dark for another person.
I would like to be able to adjust the exposure of those two areas of the frame separately. I would like to do this as a part of my workflow in LR rather than kicking it over to PS.
If you already have/use LR, then the adjustment brush in the Develop module may fit your requirements and bump up the exposure in the desired area. I'd suggest trying that before pouring $$ into some sort of plugin