Perhaps you have missed a possible implication behind: Look out for the special message at the start of the run announcing occasional extra bonus loot for completing the instance.
This is the first we will get any kind of sign of loot before getting it. Why?
Well, maybe MA expect some people running a poor time to give up the instance before finishing it. They will thus give up on the crate, but if they know in advance it is going to be crap anyway, that will even increase the chance that they give up a slow run early and start a new run for another 4 peds!
IF MA put unclaimed crate rewards back in the crate pool, we could actually see an average return per claimed crate of 4 peds or above even...
It will depend on how greedy MA are, of course, and how many people try and chase fast times at greater cost (i.e. often giving up with zero return), but it could be an interesting dynamic!
The issue of connection speeds and lagged weapon changing might be contentious. I wonder if the leaderboards will have national flags next to the names the same way that "the other MA game" does...