Seeing as how he weighed in at 212, I can't imagine 215 was a problem. He could lose another 7 if needs be. He should definitely be at 205 though. The HWs are just way too big for him to handle in the UFC.
As for who he should fight. The UFC is smart enough to know what Kimbo is, he's an entertainer, not a contender, so there is really no need to put him against anyone who is legitmately climbing towards the title... which is a lot of people at 205. So to be honest... I'm not sure who he should fight.