All today's FEM solvers can analyze multi layered shell structures. Generally no need special utilities. That's valid for structural analysis based on Hook's law, where the stress is related to Young's modulus. The FRP utilities, you have talking about, offers the special rutines for mesh and shell design which is much more user friendly. But, there is an issue, the FEM mesh generators doesn't solve the manufacturing requirements. It means the FEM net doesn't respect the fabric's wrap angle limit, darts etc. and takes a lot of work to do this right.