Also, let's look at what Olivera actually did in Cuba and compare it with a guy like Jose Abreu.
Olivera, from 22-26, OPS'd at .924-1.088. Very good. He came back at 28 and put up an .885 OPS. Good.
Abreu put up a .962 OPS at 18 and from 22-24 OPS'd at 1.376, 1.583, and 1.379. Much better even than Olivera.
Abreu put up a .964 OPS last year at 27 and this year has dropped to .836. So I would not in any way expect better than that from Olivera, especially not post-30 after not playing that much over a 4-year period. Abreu did absurd things in Cuba, was very good last year, and this year has merely been good. Olivera did good things in Cuba, so why should anyone expect him to be better than simply pretty good?