As a 5 seed, you play the 4 if you win your first game, so to me, being a 4 or 5 seed is about the same, just playing a seed that is a seed higher, but I don't know that playing a 13, as opposed to a 12 is that magically different.
I just looked at the history over the last 35 years and:
12 seeds have won 37.5% of the time
13 seeds have won 21 % of the time
So, there is a bit of a difference being a 4 seed and playing a 13 seed. Let's hope for a win in the semi-final vs hopefully a Quad 1 opponent like SMC, and maybe, even if we lose to the Zags, we might possibly make it to a 4. A lot will depend too on not only what BYU does in their tournament, but what the teams with lower seeds do in theirs. Everybody wins and there's not much movement to be made.