Borini has been out for a while and Allen has been ok, but not terrible. Lucas was detested by all fans when he first arrived.
That's a bit strong! He was only criticised by the ignorant fans who didn't understand that he would need time to settle in due to the following:
-language barriers
-cultural differences
-climate differences
-playing out of position
-playing in a league he'd never played in
-living in a country where he knew no one
You'd have to be pretty thick if you expected him to be superb right away.