Most Barca GKs were not legendary stuff so pretty much expendable. Certainly the position we had it worse in, considering what legends we had in other positions over the years.
But on the other hand people go way overboard on GK performances anyway since it's easier for the usual chump to have his "opinion" over what's top class or not.
Going by the Internet reaction and the result one would think Garcia's performance vs Villareal was the stuff of legends. In fact it was a good performance, 1 maybe 2 being top class saves, the others being shot straight at him so any run of the mill GK should have saved. But since it was a Barca GK and a cleansheet vs a good LL team the praise goes overboard.
By comparison, Vlachodimos pulled off some insane saves and an overall just as good performance in the Bernabeu(albeit he conceded two because of superior finishing and pen), but nobody praises him.
So Barça GK will always be Jekil and Hyde in the minds of fans. On the other hand we never paid insane amounts on GKs, so the dumb fans are expecting legendary performances on the cheap.
PS: don't see why Unai Simon shoud be dropped for Spain over Garcia or Raya. Hasn't dropped some calamity and the other two are not Yashin and Neuer to warrant an instant upgrade.