I still can't quite believe anyone cares in such detail who rated a page. It seems… massive overkill. Rating is not a scientific thing, it only shows people who care enough to click in the first place. It is much more logical to allow people to discuss and draw conclusions from that.
Again, I use the example of this design. I do not care who rates it. The overall rating may be roughly interesting but what I really care about is the discussion itself.
However, people seem to be attached to this feature. God knows why. You need to realize that every line of code in Wikidot is a cost and reduces the chance of new and necessary functionality. It's not as simple as "we have it, we should keep it" but "we pay to keep it and that may prevent new functionality, is that a good bargain?"
For example, it's quite plausible that keeping the "who rated" functionality makes it too hard to add the ability to rate with different names. Thus, we do have to be quite brutal sometimes about throwing out rarely used or marginal functionality to make space for new and necessary stuff.
Anyhow, the tradeoffs here aren't clear yet, so no decision.