Uh, no. He's expressing himself fine right now. I really like his stuff. When I started I tried out a style, liekd it and now I do everything liek that and no-one complains. Its called a style. For instance, Kinneas' work isn't overly detailed or super-accurate, but its amazing and everyone loves it because that's not the point of the style. The style is cute and simple. Same with Danmire. His stuff is great, and he'll improve even staying in this style. My earlier works in my style are crap, and even though I can still improve a lot, its now much better than when I started out. Anyway, even if all you said was true for lots of people, its not true for everyone. Everyone learns different ways.
Rant over
No.
Style is never an excuse on reasons why you shouldn't change or improve. Some styles are bad because of lack of knowledge on knowing what they're doing and what is aesthetically appealing. Because they don't have basic skills we end up with games like
Atari 2600's E.T. The Extra Terrestrial and
Cheetahmen. However, we know there are many amazing styles out their in the forms of games such as
Capcom x Namco,
most of the fighting games located here, specifically Street Fighter,
Mother 3, and
Megaman. What do all these styles have in common? They were made by proffesional's who had basic art skills like anatomy, perspective, use of color, shading and shape.
With these basic skill, they were able to show the audience what they wanted to express even better.
How will he know what to improve on? Is he going to randomly find it out? He wouldn't be able to if he was under the impression his artwork was perfect and that he didn't need to improve on it.
And yes, some people can improve without having people tell them where to improve, but those people are already aware of the flaws they have, and will take the necessary procedures that will help them improve.
At your newest piece, Weavile's anatomy kinda baffles me. It's like your going for this human esque piece, but the drawing's head just doesn't match the body.
http://bulbapedia.bulbagarden.net/wiki/Weavile_(Pokémon)
Consider the body anatomy Weavile actually has. He's kinda thin and lanky, but his head is about half the size of his body. And it's not really realistic, because you didn't draw him like a weasel. The anatomy you have is also really messed up.
I see shoulder blades, but they aren't spaced out well. I also don't see any shoulders, indication of a spine etc. Try doing for a midget cartoony look, his head will fit better. The arms really bug me because, again, you're going for this human esque shape
without really understanding what arms look like. Weavile's head is a little off too.
Weavile's head is arrow shaped, with his eyes essentially being the top line where it all comes to a point. Weavile's head is also, well, Idk how to describe his head shape. It's like a piece of paper being bent in a circular shape really, so a side view would demonstrate that more by showing us a little bit of the other side of his head.
And lol, being good isn't a bonus, it's the result of hard work (although some people have natural talent but that's not the point~).
Prime example of someone who took criticism and improved as a result, furthering his ability to express himself to the audience;
http://www.pixeljoint.com/p/11794.htm
http://www.pixeljoint.com/p/8024.htm?sec=icons&pg=1
EDIT: Removed "bullshit" (although tbh I like that word~)