OP is correct, V4's expressions are hopeless.  SMILEX smiles, cripes!  The problem seems to be that all of her expressions are designed around V4 never being morphed at all.  They don't even look good with V4's stock character morphs.

Sorry, second poster, it's a nice expression you have there but it still looks Tex Avery cartoonish. 

I think a big part of the problem is spherical falloff zones for morphing tools like magnets and even a lot of 3-D modelling programs.  Basically, you have to use balls to move everthing, and there has to be a gradual slope of effect otherwise everthing gets jaggy.  This often means that you end up affecting things you'd rather not affect, like cheeks in a smile or a nose crinkle. 

What you want are muscle shaped zones, so that you could simulate the effect of facial muscles twitching.  Ideally, a model would have facial muscles built-in and you would control expressions that way.

Having no jaw joint also creates a lot of problems IMO.  All open-mouth morphs suck beyond all capacity to understand and make me want to hurl shoes through my monitors. 

I could go on, but to sum up...

Me too.