I am in my 4th year of PhD. Few months ago I presented my thesis proposal which already included some of the results (that are actually published). I proposed to add another chapter (call it Chapter x).
One of the committee members told me that the results presented are sufficient for a thesis. He said that chapter x is not necessary, or it can be replaced by a literature survey (instead of presenting original work - as I proposed during the thesis proposal). He said that original work can be done during a post-doc instead. My thesis supervisor agreed.
Right now, I am in the middle of of the Chapter x [and some other stuff] (and I think I have original results that are not complete - they would be complete, if everything goes fine [which is never the case in research]).
My question is: should I write my thesis without novel results in Chapter x and then do a postdoc based on Chapter x ? Or: should I continue working on Chapter x even if this will result in a longer PhD ?
The source of my confusion: Wouldn't adding novel results in Chapter x improve my research CV ? but at the same time, will the long period of PhD negatively affect the research CV ? Plus, will I find the chance to work on this topic as a postdoc !