+1
I'll pile on too. Anything in taxable is tax efficient stuff. I have bonds in my deferred account, along with VEIRX, VFIAX and VHT. VGK in the Roth.
I'm not sure how happy I would be about getting dinged .5 for a bond fund either. The turnover in PDBZX is pretty high, and the return is decent for a bond fund, but for the extra risk I'd almost rather have my 401k allocation all in equities, and buy BND in my Roth.