Back to the question, are they less than happy with them?
Well, if they were happy - or further than that - ecstatic with them, what would we expect their approach to be? Certainly, they would have surely given them continued prominence on their site - as they would see them as a major breakthrough in the case - as AR seemed to put it on CW.
The truth is that they have been removed from the Official Madeleine site. Previously, a new click through page with various e-fits was there. Then it was removed and the Scotland Yard's thinking was cast doubt upon. There was a change - and that may suggest that they are indeed less than happy with them.
Taken from Find Madeline: "Based or {sic} more recent information, the Metropolitan Police now believe this man may represent a guest at the Ocean Club who was carrying his daughter back to their apartment. However as it is not possible to be certain that these two men are actually the same person, if you have seen this man in the pictures or suspect who it may be, please contact the Metropolitan Police's OPERATION GRANGE on 0207 321 9251 (0044 207 321 9251 from outside the UK) or Operation.Grange@met.pnn.police.uk and/or the Find Madeleine team on +44 845 838 4699 or investigation@findmadeleine.com."
Or it may suggest as some have noted that the e-fits have served their purpose and no longer need to be in the public realm. I very much doubt the family have been told this by SY -- simply because if that was the case, they wouldn't feature on the facebook site AT ALL.