What are some potential problems surrounding Walton's quasi-emotions?

The best counter argument to Walton's theory (in my opinion) was one put forward by Glenn Hartz, stating, in short, that these emotions were not based on belief but almost as a subconscious, initiated by visual stimuli.

"He [Hartz] argues not that our responses to fiction are independent of belief, to be understood on the model of the startle effect, but that they are pre-conscious:  that real (as opposed to pretend) beliefs which are not consciously entertained are automatically generated by certain visual stimuli."

Hartz's ideas are very intriguing to say the least, and as I mentioned in my Q&A, it is probably a problem Walton could have avoided by using a different terminology for "quasi."