I think Jason Richards is a good painter, but I really dislike his use of colors, alot of his reds and certain colors always look really flat to me, with not much life, his conversion work is excellent though.
About Skaven, I have just finished my 5 man warband for mordheim, the cleaning of mold lines or flash was a real bitch !
Anyway, I am undercoating them tonight and plan to have them done in around 2 weeks ( its going to take me a while to get them neat and just right ). I plan to use tons of different browns, greens, reds and dark metals.
The tails are honestly NOT hard to paint, I know they seem like they could be hard, but there is a number of ways to get around it while keeping them looking nice.
There is a way to wet drybrush ( I know it sounds weird ) that works well for minis parts like this, after this you can do a very subtle pink wash over the tails, this gives a fairly realistic rat tail look when dry. Once I get them done It will maybe show you what I mean.
About the Fur, well jeez...if everything was blended, it would look like a cartoon, this depends on aesthetic tastes also, but I think fur should look as realistic as possible, and dry brushing is the way to go. Keep in mind alot of skaven models have a good area of no fur, such as their arms and heads.
All of their gear, clothing tattered rags etc have alot of room for blending also, I know the plastic arms have alot of fur, but the metal models seem to be 50/50.
For WHFB, yea...you need lots and lots of vermin

but I do not see what would stop one of the top artists on here to sit down and paint a single Skaven to a top standard.
I have actualy done a search, and there is only about 25% of the skaven models up that could be cosnidered well done.
Give me a few weeks to get the motivation, I might be able to please a few people ( dont expect GD winning quality though as I am not some uber NMM master or Bobby Wong ).