I submitted PhD applications to various universities. Some universities I applied to do not require me to look for any potential supervisor. I have just got a reply from one of the universites, saying that the evaluators have studied my proposal and given me some comments and want me to revise my proposal. Do you think that I will have a higher chance of getting a place? becasue I think they asked me to revise my proposal.

Well it definitely sounds like they are interested! Good luck :)