I am too busy with a new release (additional security features, remove requirement for email exchange and id check, add in-app downloader with automatic sig check) and with completing the DAO and preparing 100 things regarding DAO launch (mainly to get our weakness in the communication area solved, e.g. find a dedicated person for it).
So no, I did not had time to look into it more closely and I fear it is too late to fix that.
The main reason is that the reputation is based on the onion address. If users have already offers they cannot change the onion address. So it does not help you if you change it for yourself and get the reputation data imported, but you would need that all your past trade peers also change back to the old onion address, which will not happen if they have already offers/trades going on. Beside that I never tested if changing the onion address will have further side effects, so I don't recommend to do that.
I am sorry that I did not implement that in the 0.5.0 release, but it would have added another delay and I was not aware that this feature is so highly appreciated by users.
You can see it also positive as that with a new onion address you get disconnected from previous trade activities which gives you more privacy. The reputation has always 2 sides and some people value privacy higher than the reputation history. In future we probably add a feature to optionally renew the onion address exactly for the privacy reason (but it would reset reputation history, you cannot have both but its the users choice).
Beside that it is NOT a security feature. A scammer could build up reputation and then abuse that (long con).
So in summary: I fear that train has left, sorry. Please keep in mind that such a "hardfork" update is exceptional and the first after more than one year since we launched. Once we have more developers we also will have better resources to plan such an event better in future.