In any sport, and in baseball especially, playoff success can depend a lot on chance. You can get a favorable draw and advance far because of that. Your pitchers can have an off weekend, or your opponent's pitchers can have an on weekend, and you can not advance.
So to me, the fact that he keeps getting us into position yearly is impressive. Eventually I say he has to prove he can get over that hump, but unless the level of play of the team drops off in the near future, I'd have a hard time saying you need to get rid of him. If he keeps us playing consistently at this level year after year, not only will he break through, but he'll probably break through quite a bit.
If we were to fall off and not host a regional for the next four years and also not make it to Omaha at all during that stretch, then I'd say maybe it would be time to push him out, but not right now if we were to hypothetically not make it this year.
Regardless, I'm still calling for this year to be his year to get over the hump. I just have a feeling, and if it does happen, this discussion will be moot, or mute for the Scout board regulars.