Just out of curiousity, what kind of stuff can publishers change? Do they have the power to change whatever they want? Or can you choose to decline their suggestions?
I've only worked with one e-publisher and in my experience I had to approve every single change they made, right down to full-stops and comas. It got kind of annoying actually and I felt like telling them to make whatever changes they wanted and leave me out of it. I was very surprised by just how much input I had especially with the cover art as they really took my ideas on board..... As for the way other publishers work I really can't say.
a paying publisher can change anything your assigned editor feels needs changing... you are given the edited galleys and do have the right to disagree, but if you can't arrive at a happy compromise, the publisher has the right to decline to publish... as a new writer, you'd be wise to go along with what's recommended, as long as it's not totally abhorrent to you, save the wrangling for when you've proven your work can make money for the publisher and thus can exert more clout in re such matters...
Yep. You can decline anything you like, but they can just as easily say "OK, in that case we're not publishing it."