There will be no plans of returning XP retroactive to this fix. I can bet many many people have had this happen to them after a server crash. This is not something new, the major difference is many times after a server crash before you'd end up in the Forest of Summons.
Please understand, it's not that I don't believe you deserve the XP back, we're just afraid of the endless line of others who have died to a crash (or said they did) that will cry no fair.
All we can do is to continue trying to close these issues so we get no more people making these types of requests.