I recently received a rejection to a paper that I co-authored with my advisor. There was nothing wrong with the content but the reviewer believed it was too simple by the journal standards. My advisor's advisor who has more that 30 years expertise in the field has suggested to combine the paper with its sequel (which I was in the process of writing) and submit elsewhere.
While I am getting ready to do the same my advisor has asked to remove his name from the paper. This worries me a little. It makes me think that the paper isn't good enough and that is why my advisor want to disassociate himself from it.
Could there be any other reason why my advisor is doing so? Should I ask him?