When you look at it like that, yes it's minor.
But when you look at it from what the scoreline was at the point of the save, then not only does it mean not conceding again, but helping the team gain points if it went on to stay at that result:
Save 1 - vs Palace; 0-0 at the time, Everton go on to win 2-0. Totally different game you'd imagine if it went 0-1 had Palace scored.
Save 2 - vs Man Utd; 0-0 at the time but obviously the rebound was scored. Man Utd went on to win the game but had it stayed 0-0, he's helped his side gain a point.
Save 3 - vs Newcastle; 1-0 at the time. Newcastle went on to win, but had the result stayed the same, it's 3 points he's helped his side win.
My point being that it's not like he's saved penalties where Everton are 3-0 down and the saves wouldn't have made a difference in all likelihood as the game was lost anyway.