I do agree to what you post.
However: there is more to come concerning WebRep.
The issue of the not closing voting window is, I believe, just a current glitch due to server problems on avast’s side. Happens on my machine sometimes, sometimes doesn’t. 
Security-wise, the WebRep “as is” does not provide any added value, but again: there is more to come.
And you’re right: the protection is provided by webshield and scriptshield.