I'm sorry I wasn't clear. I consider Kalil a core player as well along with many of the others mentioned above.
I was just including J.J. because he may not play many snaps but the ones he does play are vitally important.
An inconsistant long snapper can lose a game all by himself.
(I suppose I am kinda dumb though)
Agreed that he could lose the game all by himself. No doubt. We have been fortunate to have a couple good long snappers in our history. But honestly, how many games a year does the long snapper actually cost someone a game. Most of these guys are good and quite accurate.
Your core players are the players you can't live without. As much as we don't want to we could find a replacement for JJ.