
Alberic went to great lengths to not say -who- stole the Eye. The very first dragoon quest he mentions not to mention who asked the adventurer to go questioning the likely -Ishgardian fugitives'- routes. They only know of a thief not who and he certainly would not have told them Estinien might have been fallen to the Eye's seduction.
Alberic loved him as his own son. He took him in and trained him. Yes out of guilt but still people develop those feelings.
"Estinien, my dear boy... Whatever becomes of him, he will ever be as a son to me. I pray that he is somewhere out there still...and that he has not wholly forgotten the great man he once was."
I'm pretty sure once the Eye is back (unknown if Alberic was able to return it or that Estinien put it back), if he thinks Estinien is back to whom he was once, Alberic would greet him with open arms. Keep in mind, Alberic never disclosed what truly happened, even with the eye theft. Not even to the archbishop.
Alberic loved him as his own son. He took him in and trained him. Yes out of guilt but still people develop those feelings.
"Estinien, my dear boy... Whatever becomes of him, he will ever be as a son to me. I pray that he is somewhere out there still...and that he has not wholly forgotten the great man he once was."
I'm pretty sure once the Eye is back (unknown if Alberic was able to return it or that Estinien put it back), if he thinks Estinien is back to whom he was once, Alberic would greet him with open arms. Keep in mind, Alberic never disclosed what truly happened, even with the eye theft. Not even to the archbishop.