I don't see what is the big deal about revealing the clone in this issue, either with the fact that it's a clone and that they used the Scorpion to do it. First, it's the clone saga, I fully expect to see a ****load of clones, the Tarantula will probably be one as well or something related to that if I had to take a guess. Second, the Scorpion is not a "blown opportunity" for ultimization like Omega Red was, the Scorpion is basically a suit, so just stick someone else in the suit with a good and different backstory and you've fixed your problem.
I LOVED the interaction both between Kitty and MJ so much in this issue. It's the best one in a long time. Bendis, despite all his other foibles, never loses his ear for dialogue and the stuff between MJ and Peter almost made me long for their relationship to start back up, that's how good it was.
The Kitty outburst is typical Bendis overdramatization (see when MJ flipped out in past issues over Gwen being in love with him or when Peter just flipped out about MJ not listening to him when Harry showed back up.) Plus, we didn't see what else made Kitty act the way she did, maybe she was just having a bad day. Either way, I welcome MJ back into the fold, she just makes the story better all around. Like Peter said, he has no other friends, he needs MJ to bounce stuff off of to tell a better story, both as a different "voice" than Kitty's and also to talk with Peter "in person." As good as Kitty and Peter can be talking on the phone, nothing is as high quality as the consistently good reaction shots we get when Peter and MJ talk.