No. The stupid fans are the ones that want to stack an entire department. You can't buy 3 or 4 attackers in one summer. It's going to take them time to gel, get accustomed to the system, etc... This is not Football Manager FFS! You can't restart when you lose a game.
We've already acquired Llorente, and we only need one more SS to complement Llorente in attack. Once that is accomplished, we can keep Matri and Vucinic as bench options, with Vucinic being the ace in the pack/an impact sub, and add a youngster to complete the attacking quintet, as I mentioned in another thread.
Selling Vidal would only serve to weaken us, and greatly strengthen a European rival. A dumb move by all accounts.