The NPC stores that sell weapons etc i find are really clumsy. I'd prefer an interface a bit more akin to the exchange.
Having to chat to someone to get them to the store, then have to navigate a few different menues i find is a bit more clumsy than say searching for a weapon or having tabs to filter things.
Or even just copy and paste the interface for the C-store in how NPCs sell things.
On a related note.... please can you just have one type of exploration markers, and not lots of different levels.
Just have the lower level exploration cluster missions only grant a small number, and the high level ones gives more exploration medals.
The lower level rewards will be cheaper and the high level ones would cost just as many. I guess it would require a bit of mathematics to figure out the rates.
This would mean that my low level ones aren't as wasted (especially as items you buy with them are bind on pick up).