Watford seemed incapable of learning from their mistakes, and West Ham's third came from another rebound, Marko Arnautovic firing his 10th of the season before Noble rifled home a penalty to complete the rout 12 minutes from time.
Asked if the club would appeal against it, Gracia replied: 'For sure.
"They are improving and they are now playing better than at the beginning of the season", the 49-year old said.
'I prefer to be respectful to the referees decision and I prefer at this moment to not say what I am thinking about that. We know it will be an equal game - the first game we won but it was very equal. Antonio was fouled clumsily by Kiko Femenia, handing Noble the opportunity to send Foster the wrong way from the resulting spot-kick, sparking a mass exodus in the stands from disgruntled Hornets fans.
Real want around £20 million for Ceballos and despite spending £90 million last summer Pellegrini is planning another overhaul of his squad.
"It's impossible, I can not know the future", Pellegrini told reporters.
"When we started the season, we had just six weeks working in pre-season, but now after one year of working we have an improvement, and as I said that must continue".
'So he has a lot of qualities - age and nationality, so maybe some of the big teams or all of them will want him. "But that is one thing - the other is whether he will stay here or he goes, and I can not say at this moment".
West Ham take on Watford in the last game of their season on Sunday, with a win taking the club to a total of 50 points and a top-half finish.