I rather enjoy my daily heroic space mission, and I will probably continue to do them with the assumption that Bioware will eventually put something worthwhile on the fleet comms vendor, like top grade crafting mats.
Because, as we all know, there is nothing actually useful on there now.
There's no reason to think that any new crafting material will be implemented. The ONLY reason (I suspect) that the Grade 8 crafting materials that are currently there, are there, is because of the craftable Tier 7 spaceship and those mats are required to make them.
At the moment, no space related items require the new high end exotic materials.