I kinda doubt that salvage pieces or prices of ore will be fixed. The sheer power behind salvage pieces (and the fact that they're easily some of the best if not THE best pieces out there) would suggest that a balance was necessary in order to prevent a flood of these gears into the FFXI world. Salvage pieces can still be completed at reliable rate and the recent addition of the chest in salvage made it beyond easy. We have become so efficient in salvage areas we can hit things like ramparts and all NMs on the way up to bosses and then claim victory over the bosses too. SE likes making us wait for things that are high-end or considered the best. So I wouldn't be surprised at all if they just left this the same due to the nature and power of the items themselves.
Also in relation to Khroma Ore prices, they're 350-360k per 1 on Siren which is quite expensive but people manage to do it just fine. They drop from any ISNM and the drop rate is pretty high too. In the last month or so I've seen a total of 72 (12 different groups I went with) do the Orobon ISNM for Khroma ore. I never really see shouts for them other than in JP primetime so maybe they just do it more or something... anyways in those 72 runs there were 46 orbs that dropped Khroma ore so I think its pretty safe to say you at least have a 50/50 shot or so at getting one. A group going 0/6 on khroma in an ISNM would probably be more of an anomaly than ones going 3/6 or so.
XI Wiki

