I don't see Chavis in the 2B mix at all. He is moreliekly to be in the 1B mix with Dalbec, with starts going to the hotter bat since they're both RHH. Unless the Sox go get a LHH 1B like Moreland, which is certainly possible.
Bottom line, the Sox are adding maybe 4 SP to the MLB roster. To decide that 2B and 1B can be ignored to focus on pitching is probably not very accurate. I don't see huge expenditures at either position, but I don't think either is solved with solely players already in house. Unless Bloom spends his allowance on Bauer, which I also do not consider likely (although not impossible)...