One thing to remember here is that the Couch Potato focus is on simplicity and low expenses, not perfection in asset allocation.
So for Total International Stock Market you can use Vanguard Europe Pacific (ticker:VEA) or I Shares MSCI EFA (ticker:EFA). It would also be possible to use the recently introduced Vanguard FTSE All World ex USA (ticker:VEU). There are differences in composition, but any one will serve as the broad brush stroke asset class.
Energy, as many have pointed out, can appear to be problematic. The Vanguard managed energy fund, VGENX is inexpensive, has a good track record and appears to be broader based than VDE or XLE which are highly concentrated in mega cap domestic energy companies.
I think it is reasonable to be concerned with the dominance of the portfolio by gigantic companies, e.g. Exxon-Mobil is 20 percent of the XLE/VDE portfolio, Chevron follows with nearly 11 percent, but domestic all companies, by their nature, are as international as any foreign headquartered energy company so I don't think the domestic concentration is a liability.
Some would say it is favorable, since it means some small domestic exploration and production companies get included in the index. Personally, I like the inclusion of companies like Marathon, Devon, Apache, and XTO.
Time will tell whether the substitution of the international bond fund BWX ETF for managed BEGBX is a good move. My bet is that indexing will out.
Scott