I completely agree.  Her future reading ability is probably going to be like one blurred cryptic image that could mean anything.  The main application of her power I wanted to use though, was like to have her walk into a room, flow walk and know everything that's happened (Actions, conversations, etc.) in that room in like, say, a certain time span.  Would five minutes be fair?  Ten?  I might need to rewrite the bio a wee bit since I threw out a random 1960s date. O,o) 

Say, if someone stole something, Lin could use her power to try to flow walk back that number of minutes and see who stole what with a guesstimation of when (unless she could see a present clock's past time).