It's been a thorn in my side for awhile that the art subforum is, in my opinion, overmoderated. I don't think that it should be held to a higher standard than off topic's rule about validating your opinion. A little "I like this a lot because x" really should be good enough.
The fact that something like:
Wow! Nice head texture. I really like how the green lines bring out the red in the nose region
can be cause for an infraction in some eyes is just silly. You don't have to criticize art to appreciate and talk about it. I'm in favor of changing the C&C rule to the same "say why you like it" policies of off topic. Also, criticizing other people's critics is fine, I know in the past people have been called out saying "your critique is wrong here's why", and those posts have been reported, but that's silly. This type of relevant dialogue about art is good for the forum.