This is a minor thing, but when I shut off the turbine, it dosn't have a spinning down animation. I am using both Ludicrite and Resonant Ender blocks. This is a minor aesthetic thing, but it is kind of bugging me.

That's because I used the simplest possible test when deciding to enable/disable the TESR: "is the turbine active?" I suppose I could burn some client-side cycles monitoring the turbine's velocity and only swapping back to the non-TESR codepath when the velocity nears zero.

It's ok, you dont have to work on it. Your mod is great for generating unreasonably large amounts of power, so I can forgive it if the turbine doesn't spin.