You mean a variety of belt more geared towards attack than the current one?
Not in itself a bad idea, keep in mind though that the warsong belt doesn't do as much for survival as the cube neck does so giving it stats like the dragonchild necklace would make it far too powerfull.
I'm also not sure how it would affect classes like the EA whom are already viewed as OP by many. Adding more damage to classes like them who rely almost exclusively on high damage might break things.
A warsong belt is also far more expensive than any r8r piece unless the belt was made to cost a significant amount more than regular pieces.
On the other hand some more choice in endgame gear would be enjoyable for quite a few people I'm sure. Perhaps you could propose a set of adds?