Spring Training is mostly a nice chance to enjoy some largely meaningless baseball. It’s a nice chance to drink some beer, enjoy some nice weather, a reason to go to Arizona. From a baseball standpoint, there’s not a lot of utility to the results of Spring. There is a faint correlation between how teams do offensively in the preseason and the regular season, but by and large we just can’t gauge which performances are actually meaningful.
There are larger issues than just how predictive Spring is. When a roster is squeezed like the A’s appears to be, final cuts can be determined by how players do in the preseason.