There is not much you can do to make flagstone coping look even on the pool edge since it varies in thickness.The stacked stone could use some work.

Thank you for your reply, Pools94. When you say the stacked stone could use some work, do you mean that there is something that can be done to improve it, or that it is just a poor job?
Any advice for improving the appearance of the coping or stacked stone would be appreciated.

SM

On the coping there is not much you can do to improve it. Since it varies in thickness there is nothing you can do to make it look better. Nature of the beast when you are dealing with natural stone. On the stacked stone they could have cut each piece to fit unless you are going for the grouted look in between the individual pieces of stone. If you were going for that the least they could have done is butt the stone under the flagstone coping so you don't have a big ugly grout joint there. I don't know if it is worth pulling it all out and redoing it but it would not pass muster with the customers in my area.