I've never seen buttons you speak of for the whole time whenever I was using Newgrounds Art Portal.
So I have no problem getting used to other methods of browsing & viewing art pieces.
But sometimes I do imagine having buttons like those:
1) To view pieces made by a particular artist, in Date/Score/Views order (I may select in which order).
2) To view all pieces from a search result in the Art Portal (again in an order).
Whom do we need to inform to raise awareness of this problem (or better, lack of goodness)?