Why? you can't miss money you don't have ... we have already replaced him with three new players and we have plenty of money to buy more. Eriksen won't sign, he's not the first he won't be the last shit happens.
It might not fit your negative arguments (you are a troll after all) but players getting old and leaving is not new, since Poch has been here we've lost BAE, Gomes, llorente for nothing, and a whole bunch of players have also been let go cheap just to get them off the books, these things happen you can't stop father time.
Next January, or in the summer, we will possibly lose Eriksen, Vert, Toby and maybe Sissoko, Danny, Wanyama for very little money, such is life. All off them will be fully amortised assets so no cost to the club.
The fact we are now generating >100m profit will still allow us to sign new players, this is not 2015 anymore we've spent the 800m to generate income, we're at a whole different level.
I'm sure you will find something negative to post, but ageing players running out of contract, superstars wanting a move, that has and always will happen just get over it.