Don't get upset if your editor asks you to revise your manuscript, take something out or add something.
Every writer can improve no matter what stage or level of writing you have achieved. A writer should listen to input and use it in a positive way. Revisions are a part of the process of publishing.
Some editors have different editing styles and what works well with your previous editor may not work well with your new editor.
Stay open minded and listen to feedback. It can make your writing better, your story structure stronger and your details sharper.
Stay true to yourself and your story. It's going to be okay. You just may be surprised with the results.