This is a question I have wondered about for a long time. There is no doubt that Butler can really swing the stick - it has been seen at every level of minors. Butler has usually been one of the younger players at each level, too.
It has also been noted that he has usually been the worst defender in the league at whatever position he is playing whether 3B, OF, 1B.
Why not just have him be the heir apparent to Sweeney at DH? Hal McRae, David Ortiz and Edgar Martinez did well at DH. Is it part of the lack of respect for the position? When KC is DHing a guy like Shane Costa, that is just nonsense.
KC could free up Sweeney for trade this summer and plug Butler into 500 ABs for 2008. 2007 could be a few months of just swing the bat. KC offense could use a jump start.
Why the reluctance to have Butler full time DH?