I've done a few anims in LW 7 too years ago, I know how hard it is and how time consuming. Pirateguybrush has some valid points though. Some more squash and stretch to give it more character and give the character the appearance of weight would indeed improve it a lot. I would have thought the current state of LW to be more capable to do character animations, but apparently it's still a bit limited. Going over to Maya may only make it worse as you need to learn an entirely different animating system.
I think there are a few plugins that make some parts move automatically like Max's ears. That could be made to move like an antenna for example.