I have the same problem w/the Konica Hexar RF/Contax G2 bodies, which have a similar front-oriented strap lug position. Not sure why the designers of the Hexar RF/G2 chose that position, since they weren't working off a legacy SLR body, @ least officially.
My guess is that even had they not been forced to work w/legacy bodies as a template, the designers of all these cameras were so used to designing SLRs that they didn't realize how much smaller & lighter most RF lenses are & how that affects the overall balance. From the looks of it, Cosina appears to have @ least partially learned their lesson w/the Zeiss Ikon, but I'll let an actual user/owner weigh in (no pun intended).
EDIT: Having read Tom's mention of how the swing open back door of modern cameras affects the lug placement & looking @ photos of other RFs (e.g., Canon P), I'm thinking that may be the most significant engineering reason for the forward placement. However, I'm not sure why this couldn't be addressed by simply moving the lugs higher up (but still on the sides), as on a ZI Contax or Nikon RF, though I guess that would force the relocation of the flash sync sockets on some cameras.