So you think it was funny that she was dumped, therefore the "LOL" smiley?
What I've heard, Jennifer wasn't told that she was going to be dumped until the filming of "The Gift" was about to start.
Correct information or not, she got the message rather late because Kim was the one who was chosen to be dumped after season 3, but those in charge changed their minds after a silly inside poll in a glossy magazine.
What I've heard, Jennifer was depressed during the filming of "The Gift". The other cast members weren't too happy over it either.
But maybe that was funny too?
She got the information that she was going to be leaving before filming of Scorpion Part 2 because she is listed as a guest star. This is a fact. You need to take a step back and look at the facts objectively. 1) she was listed as a guest star in the previous episode, as I mentioned earlier, this involves a different contract, and different pay, 2) she wasn't in any of the season 4 promo material. Therefore she knew well before she was handed a script to The Gift.
Just because you didn't like that she left doesn't change facts of the matter