You weren't getting deep bass response from the RE-600?  It gets depth, but its bass isn't high in quantity which will effect presence at times (though I had no issue with that either).  I can agree with the lack of air though.
 
As for the box, you just paid a 400 dollar premium for an IEM, they wanted to make it look nice. So no, you own't use it again, or you might, but it's supposed to give them a premium packaging, you kow, for those that like to do unboxing videos.  Not a paper/plastic box
 
Quick note on the connector, if you bought yours recently, and your connector is at a 90-degree angle, you shouldn't have the connector issues.  The connector issues reported are specifically related to the 45-degree connector (which has since been changed).  At least this was what I was told by a HiFiMan rep.  

Mine are recently bought new, so should be latest version. The TRS are straight and the cable enters the phone at 90-degree angle. I didn't know there was a 45-degree angle model before and that specific model had the durability issues. Anyway I will be extra careful just in case.
 
As for bass, it goes deep indeed but with low volume (quantity), which happens to be a slow roll-off of the deep bass that I feel is missing. I guess my original text wasn't clear, so thanks for pointing out so that I can explain what I meant.