I am halfway through my PhD (given 3-year contract) and I feel I'm in my worst phase. The PI (let's call this PI X) who recruited me as a PhD student left my institute for a better position somewhere. Before X left, X assigned us (Ph.D. students under X) to a new PI in our department who is not yet all experienced in the work I'm doing. Once in a while X is talking to me through skype but now X seems to be mainly interested in authorship of the work we have done together and also a project we planned to do.
The main problem I'm facing now is, I don't have anyone to give me feedback on the analysis/interpretations I'm making from the data. If I don't get any critical comments/feedback on my work, I'm feeling I'm not learning anything new. And, this will also be a problem in the long run, when I make my work into a manuscript. Our department head, who recruited X seems to care about the situation but I didn't discuss it with him. As I have this new PI (who is also recruited by dept. head), if I discuss the situation with the department head, things will get more complicated. I know as a PhD student, I should be more independent but if I don't get enough feedback on my work, how can I improve my critical thinking.
Any suggestions on how to deal with the situation is greatly appreciated. I can provide any additional information if required.