I did it that way because of the original concept art for the character. The Templar in Paht of Exile always had that little monk bush in the back.
Also the Gremlin's head is supposed to be a bit bigger due to the fact that the creature itself is to be around 5 feet tall. More of a slight cute factor added in.
The Flesh Hound has that type of mouth because I thought it look a little bit more eldritch and creepy than the usual canine set.
But thanks for all of your comments!