Conaill,
The voting system you are proposing is a modified variant of STV, a form of proportional representation (basically, you're proposing running it without fractional or random transfers). Proportional systems tend to reflect the diversity of public opinion rather than the general views of the majority. If you favour proportionality here, I would recommend that you advocate for a more mathematically sounds version of STV that incorporates the fractional transfer.
While I happen to be a fan of proportional representation in general and STV in particular, when it comes to politics, I don't think it is really what we want in an awards process. We are looking to express the majority consensus of our community when we give out awards, not to reflect its diversity.
It seems, given that coding is already underway, that it is probably too late to propose switching from AV/IRV to STV at this late date. If you want to back STV next year rather than multi-vote plurality system you did this year, I think it could be an intriguing proposition and one I could be talked into. But I think the boat has sailed on how votes will be counted this year.