Eric didnt play enough matches to say he will be very good.
In fact if Guardiola doesnt use Eric is because Rubén or Stones are better.
Money box in Barcelona is empty. Thats why Barça mass media are pressing with the idea Eric is the new Piqué or Agüero and Depay are the solution: because they are free.
But all of that is a LIE.
And yes, Luis Enrique hates Real Madrid. When he played VS Real Madrid with Barça shirt he became in a pitbull with bloodshot eyes, protruding veins in their skin and Jack Nicholson's face in The Shining. He scored them lot of goals wearing Barça shirt.
I dont know what Real Madrid did with them. So I would say just refuse them.