If we add any other SCPs or Job Packs, we can include them in platinum, but there are some logistical issues that we can't account for when giving people who have already purchased both of these things.
Playable surface scps are not really a good idea, because there will never really be a lot of people roaming around the surface for them to interact with.
With the lag/crashing concerns with our previous system, and how this would drastically upset the balance of the server, I don't believe it is best to add mining back at this time.