Really I think that the only way to get an indication (and it would still be just that - an indication) of the more well received beers relevant to 'craft' beer lovers would be to limit the voting to independent breweries only.
This is not to say that large commercial, global, multinational companies can't own breweries that make fantastic beer (look at hoegaarden grand cru) - just equalises the field and brings it back to craft.
If you don't do that, you will get bigger breweries who make nice enough beer that enough people have heard of and are interested in enough to vote. I'd vote your Acerola Tarwe above Matilda Bay (well probably - haven't tried any but I don't really like MB and I'd pick out an acerola beer or saison or whatever before I grabbed a fat yak at a bottle shop) but how many others would? Make something judge by popular vote and popular vote is not only what you get, but what you have to accept.