ya the weird random cartoon face thing is really annoying for his art style, it would fit if his stuff was more cartoony but he does fairly realistic drawings so its a uncanny valley effect.
for example anime has a fuck ton of that kind of crap, the large screaming heads, weird eyes and other extravagant things but for most it could be argued that it fits the tone/style of the anime. not not always.
imagine if spirited away or grave of the fireflys did that kind of stuff. it would just be out of place and distracting.
Edited at 2018/10/05 20:22:22