There is a difference between beginning your career in japan/asia and continuing it there when it is severely lacking in real talent. he is just padding his record.
he needs to stay in strikeforce instead of fighting guys with 8-6 records.
But i guess he might just like to stay active although the fights he takes in DREAM don't do him any favours in showcasing his "skill" that would suggest he could take on machida,shogun, bones jones and the like.
Wtf are you talking about he never left Strikeforce and he went back to Dream because he got invited back since he's the Champ.If Silva fought Mousasi the same way he fought Chael you would see a new MW champ.