You literally just brought up, which I quoted, how we have no idea if Park will be back this year or next year. If your concerns are about future prospects, Kempt is not your guy. As for right now, Kempt is the guy because Park is unable to play.
I repeat: Kempt doesn't do anything that Park cannot do. I fail to see any fundamental ability that Kempt has over Park, it's just a matter of coaching and strategy. We have no reason to believe that dropping Park into the same offense we've run the last two games would've produced worse results.
Kempt did good at OU, he did what was asked of him, but he wasn't the Heisman QB some people are making him out to be. He ran a simplified system and had a ton of help from our large stack of great skill players making great plays (which is still awesome). I won't pass much judgment for yesterday's game either way due to it being both garbage weather and it being Kansas, who our defense/special teams absolutely destroyed. There is literally nothing he does that Park can't do, and Park is the targeted long-term solution. Dusting him off as useless now to Kempt is what's really asinine here, and it's happening a lot. In this very thread. Such as the whole "Colin Klein" screed.
Park has had one bad game this year. One. If he doesn't come back, sure, we can still have a good year. The ceiling still seems higher with Park around, though, and I'm not sure what points of data or skill anyone can use to defeat that point (especially considering that Kempt has a grand total of two data points on his career). It's hard just by itself to compare Kempt and Park because they've run very different offenses (and, for what it's worth, I personally like the Kempt-style offense better. I just think that he's not a better football player than Park is). As for our prospects this season, I don't know what will happen with great certainty because the Big 12 seems to be a weird conference this year. There's a lot of parity and unpredictability. For the offense specifically, they have 1 bad game, total. Between two QBs. For all we know, they could be fine either way.