We have yet to have a bad experience with FlightEase, booking odd itineraries, i.e. home to embark point, disembark point to home from different continents all handled with ease and if the airlines change flight schedules, no cost to you. Your may pay more, likely you will pay less for what you can do on your own. We no longer have a mass of points to use so we find this a very useful solution.
We look at it as you are making a big cruise spend, why the need to nickel and dime the cost to get to where you need to be to do that.