I, like others, are having SOME trouble with the assumptions. However, given the assumptions, this is not yet obstruction. It appears that it's ABOUT to be, even given the assumptions, as if the fielder has to go through or around that foot before F2 has the ball, it will be OBS.
Back to the assumptions though. The slide, already, looks to me like she's not taking her chosen path and has already reacted to the catcher being in her path.
Besides --- look at her face. It appears she's confused already - totally obstruction.
