We are big fans of Mama Melrose, so whenver we do it, we eat there.
The FDP seats are all the way to the right of the theater. We have sat there a few times now and never thought they were bad seats. I have heard others complain about them, but like I said, we have always had a great view.
As for if the package is worth it or not, I feel thats a personal decision depending on what is important to you. If you dont mind waiting for 1-2 hours for Fantasmic, then it probably isnt worth it. If you like a big meal and would rather not wait so long, then yes it is worth it. I find the package at MM is a lot of food...more than we would get if we just went in for a regular dinner, so I sort of feel it is a bit much, but I do like not having to wait in line forever for Fantasmic. We usually do the package, however when there are 2 shows, we dont and we go to the 2nd show without having to wait in line.
Good luck deciding.