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I've tried using progressively decreasing radius sections to form a sort of "faux easement" and it does improve the looks, and maybe operation a wee bit.  The whole concept of an easement is to transform tangent track into a curve of given radius in our case.  That is to say the easement begins as a curve of infinite radius.  Flex track does the job, and in less space.  John Armstrong's book gives good instructions on this matter, and the Paul Mallery book gives the actual equation for a cubic spiral (!) and templates if you want to go there. The point is that an easement is a spiral; there is no sudden change of curvature.  Easements will take less space than faux easements, and will materially enhance operation.  They are worth using on any mainline trackage.  Guess that's why I like to switch!  Have fun!
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