Changing some part of the paper after getting accepted for a conference My paper got accepted in an A* CS conference, however, the reviewers criticized several points and suggested many others. They suggested improving the method by adopting and involving other approaches which need implementation and other further evaluations. 

I agree with the reviewers on some points and I believe this would make the paper better. Consequently, the paper will be really different from the original submission. Since it is a conference and there are no further review rounds, I am wondering whether I should modify the paper (part of the method, result and maybe conclusion) based on the comments of the reviewers.
I am wondering whether I should modify the paper...based on the comments of the reviewers.


Yes you should. Acceptance was (most likely) coupled with an expectation that you'd address some or all of the comments. The reviewers (presumably) consider their comments relatively minor, since they'd have rejected otherwise, and are trusting you to make sufficient changes (that they won't check).