I'm not sure what launcher is. Can you give more details? I will try out the app you mentioned.have you tried any other launcher? try clearing cache by using an app 1tapcleaner from market.
if you are ready to root you can solve this slowdown. this is the second time i am reading about slowdown in 24hrs.
GO Launcher. try this. it'll replace the LG Home screen with its own icons.
Sam the golauncher doesn't seem to help much.