Don't go there for the kosher food. If that is the factor, might as well skip it.
+1
If you've been there before, I say that the more direct routing trumps the fun of the FCT, particularly given the mileage premium. You're scotch collection at home is plenty fine to rival the FCT, too + you can actually enjoy it with wine and dinner in your own home with family which, to me, would certainly override the prospect of FCT kosher fare. Even if you didn't keep kosher, I question whether it is worth it.
Also consider, that the later your departure from EWR, the more likely you are to be delayed.