no i don't think they can fix it without a extensive redesign. seeding as they'll probably have a new system on the market in 2 years they probably won't fix it. and once there new system is out they'll probably drop all support for 360 including rod repair just like they completely drop the XBox when 360 came out.
At first, microsoft wouldn't repiar the Xbox 360's with the ring of death. Thats why it was dubbed, the Red Ring Of Death. 360 is rendered usless. The amount of 360's suffering from the affliction has decreased