The CMA in the UK is still trying to block it. Appeal is in two weeks. That said, even if they were successful I get the feeling that MS would just do a business carve out in the UK and acquire ActiBlizz anyway
Only when it actually goes through, and companies are very, very careful to not intermingle during an ongoing merger as that leads to problems that kill mergers
Well his company just got sold to Microsoft. So unless I'm mistaken and Microsoft plans to keep Bobby in the CEO position (which would be an EXTREMELY bad look) I dont think its up to him.
Just for the record, the merger is not happening yet. Even if it's approved in the US after the FTC lost it's bid to pause it recently, it has still been denied in the UK. That has not been reversed and the appeal process for that typically takes longer than the deal would be possible. MS is seeking an expedited appeal.
Now, that being said, the UK's reasoning for stopping it was weirdly bad (cloud gaming monopoly), but that's what they went with, so who knows.