The next update will see the start of the "real" metagame econ going in. Not final by any stretch, but closer.
Scrap has been added as a resource. That's what you get when you sell parts. It generally also replaces credits in crates (though crates are mostly more generous about parts now anyway). The premium parts in Drek's Den cost Scrap.
That change helps clarify the motivations behind hoarding credits vs. saving for the parts.
We've also added more crate options (though the schema for these will be changing again).
Vanity items are on the list for purchase for sure. We haven't really talked about consumables (health/buff potions). I don't think we're opposed to them per se. I'd wonder if we needed them in a game that's already got quite a bit going on... But, we're here to get feedback, so keep it coming.