I think "...."'s post kind of summarizes the approach that many take these days to using the FMS to plan approaches. So much work and planning may go into designing a nice little picture, when ATC's plans never took into account yours.
As far as a visual approach, V/B is a much better tool for learning the profile to an idle thrust 3 degree approach. Much better to instill this early on in the apprenticeship of learning the jet profile, harder to convince pilots of this benefit later on.
As far as someone planning for a "circling approach" using the FMS, well, do the search on this forum about "circling approaches" and the lateral limits etc. It was an eye-opener for me (especially TERPS), and FMS self designed approaches are not the place...