I started out thinking I'd like to see him in the bullpen myself, but I've reconsidered...he's doing so bad it's not like I'd want to see him come out to pitch when we have a slim 1 run lead, or something, and if you just leave him on bench whole time, it's a 'waste' of a bullpen spot and helps him not..
Minors is the best option imo, but that may be too much for ego/contract. With DL, at least as it's ending, it's a rehab excuse as a way to get him to play minor games later, for a week or two, to see how he's doing? Or do I not understand the DL thing...