If the stats do get reset after the fix, I would suggest having an event that weekend as a kind of treat. I'm thinking it would be good to add a x1.5 multiplier (or something to that effect) to the end round bonus points.
The point of this modifier would be to let players get some of their promotions back to soften the blow of a full reset. By giving players an added bonus, you not only allow them to get some stuff back sooner, but there is also a good chance that you will re-energize the playerbase and end up getting more people online. Players would still have to work their asses off for high level weapons, but at least they would have something to show for all of their play time at the end of the weekend.
The point of this modifier would be to let players get some of their promotions back to soften the blow of a full reset. By giving players an added bonus, you not only allow them to get some stuff back sooner, but there is also a good chance that you will re-energize the playerbase and end up getting more people online. Players would still have to work their asses off for high level weapons, but at least they would have something to show for all of their play time at the end of the weekend.