as of right now you can attack ALL of the demons without needing to transform them into their forms.
Solonar without the enraging and spitting out lil bugs.
Ungoro demon without a giant felpuppy (dog still hits you).
Winterspring Demon: I didn't try him, he might not do the "demonizing"
Burning steeps will still enrage and hit for ~800, not the 1.5k, and needs to be kited due to the change with Scorpid Sting.