Eusebio was in the club recently and knows the current players better than Koeman.
Koeman's experience of managing top players is limited to one season in Valencia where he had David Villa. He do however have more experience itself in coaching, but everything else you argued against Eusebio can be turned against Koeman too.
Your hate towards Koeman is almost as strong as mine towards Neymar, nice to see that
About Koeman:
1. assistant of Dutch NT team in 1997 and 1998 (Seedorf, Davids, Kluivert, Bergkamp, Overmars, Frank De Boer, Ronald De Boer, Van Der Saar, Stam, Reiziger, Van Bronckhorst, Hesp, Hasselbaink, Hooijdonk, Zenden, Bogarde)
2. assistant in Barcelona 1998-2000 (Rivaldo, Figo, Kluivert, Pep, Luis Enrique, young Xavi, Frank De Boer, Cocu)
3. manager of Ajax 2001-2005, managed players like Ibrahimovic for 3 seasons, Van Der Vaart, Sneijeder, Heitinga, Stekelenburg, Chivu, Van Der Meyde, Maxwell, Litmanen, Vermaelen)
4. manager of Psv and Feyenoord, in Psv he trained: veteran Cocu, veteran Reiziger, veteran Kluivert, Afellay.
In Benfica, he trained: Simao Sabrosa, Nuno Gomes, Geovanni Deiberson a former Barca wonderkid.
He trained Pelle in Feyenoord.
In Valencia he trained: Canizares, Raul Albiol, Villa, Juan Mata, David Silva, Marchena, Albelda, Baraja, Morientes, Angulo, Ivan Helguera, Vicente, Joaquin.
His experience in general is bigger than of majority of other candidates.
He won league titles, unlike majority of other candidates.
He coached lots of former world class players and tons of former Barca's legends.
He was a player in a Dream team, and already an assistant at Barca.
Anyway, it will be interesting to see whom will a board pick.
Sampaoli seems quite emotional and full of energy and he jumps while watching matches all the time.
Koeman is cold as ice.
I personally think that it will be Sampaoli, Koeman, Blanc or Valverde.
Barca never hires random coaches from Napoli, Monaco, Nice and similar, who both didn't won league titles, didn't coach top teams and have zero connections with Barca.
Also, I don't believe that we will hire Eusebio or Unzue while we have at least 4 better options in these candidates from above.
#TeamKoeman or #TeamBlanc (because they were former Barca's players and they actually won league championships in Europe. Those are key things in my book, after tactics, of course)