Things will continue as if all is well. Mr. Karzaï has admitted his mistake, but he probably intended to sneak the bill in through the back door. If no one had taken notice, the 10% of Shi'a would have probably voted for him, which would have facilitated his re-election. It is very easy to apologize after having been caught; we've seen that quite often.
Where there is politics, there is partisanship. I do not think that the revision will be completed before the election on August 20. Such tactics have already been used here in Canada as well. You have not quelled my doubts.
You have your theory and I have mine. I will conclude with that.