In the books she finds out after season 1 (or book 1) and I quite liked how Lindsay wrote that. So I hope they're going to let her react in the same way. Not... overdramatising everything like she's been doing the second half of season 6.
*spoiler alert if you haven't watched season 6*
And making her fall in love with Dexter was just wrong. I mean, they grew up together as brother and sister, why make that all weird? Furthermore the plot was meh. I didn't really like this season. The first few episodes I got the feeling they wrote the script for dumb viewers. The only thing cool about it was the doomsday stuff. I particularly liked the four horsemen thing in the beginning.
[/endofrant]
I did like season 5.