I don't think RK would ruin their credibility to put box and loose figure together, but I still worry if they are dealing with someones who provide loose figures. Aren't they supposed to be dealing official parties (say, account manages from Takara or Hasbro) all to time?

If RK wants load a truck of loose seaspray or leader class starscream, they can do it easily, but that's not the RK I expect. I expect them make phone calls to Takara, take orders from stocks that have been going through all QC procedure.