Line edits/sidebar comments by your agent. I always stress these are suggestions to achieve a goal. How author arrives at that goal is up to to them, but
I DO put foot down abt blatant "rookie mistakes." Or major arc problems,sensitivity issues. I don't do this to be obstinate;but you should stay flexible too.
We may do 1 round edits. 3 rev & 4 edits. 1 rev & 2 edits.
And if I like your book but do NOT have any vision for fixing problems I find, I am doing you a favor by NOT offering rep, so you can seek an agent who sees how to make it shine and soar against all it's competition.
I am not the person you send your 1st/2nd draft to. My editing rounds are all fine tuning, tweaking, polishing, or taking advantage of opportunity to amp up stakes tension emotion etc. I am not going to teach you how to write.