The expense ratio is relatively low in comparison to both international total market funds, as well as to international high dividend yield funds. (etf.com)
Sure, with Total Market Fund, you don't need any other funds to diversify, but would it better if you also add some sector / category funds? (thedigeratilife.com)
A good domestic index fund (such as Vanguard Total Market Fund) will track the index fairly closely trailing pretty much by the fund's MER. (canadiancapitalist.com)