I use all the things of your list above, I'm using lod for all my entities and shaders, distance clipping of several entities, and use pssm only for dynamic entities.
but I plan to use user adjustable settings for shadows and quality (decal or pssm shadows for units etc.). I will decrease further poly count of vertex aniated units, only lod0 will look nice, that will probably have a great effect on performance.

the purpose of 3DGS is mainly to make simply simple 2d-3d games, so it can be understood that some features requiring more experienced programmers are not included, or only in the pro version, we have to live with it, beside its easy programming language.