Don't exaggerate... Alexis will never be a combination of ronaldo and romario. romario was the most clinical finisher I remember watching. Ronaldo is also in a very different level.
And you probably meant that in the way Barça used to play, the false 9(Messi) used to thrive.
It was a slight exaggeration, but the position Messi occupies is the focal point of our play. So many goals come from that position, regardless who plays there. But it looks like we will get a new CF for Messi to play behind, so this could be interesting. Messi really needs to get a massive rocket up his behind, and I think Lucho is the man for it. Hopefully we get Cavani, but if not, I wouldnt mind moving Pique permanently to the CF position where his goal scoring prowess can shine and his brain farts are less decisive.
Like this:
-----------------Pique-------------
------------Neymar---Messi--------
-------Iniesta--Busquets--Rafinha---
Alba--Dedeckenbauer---Luiz---Danilo/Bartra
--------------Ter Stegen-----------