One of the problems with "Centrism" as currently practiced is that you end up with either the worst of both worlds or an absolutely incoherent and unprincipled position.
To take an obvious example. Many liberals think that torturing prisoners is wrong and should be treated as a war crime pursuant to laws currently on the books in this country. Many conservatives think that torture is AOK because obviously anyone who 'wants to kill us' deserves every moment of agony that can be managed. Centrists on the other hand agree that torture is wrong and illegal but that nevertheless the people who actually did it should be rewarded for their service.
Not much in the way of moral clarity in THAT neighborhood....