HF17 has new feature, SP delegation. It delegates one's voting power and all right for curation reward to other account. If Ned delegates all his voting power to Steem Guild curators, he won't get any reward while curators have.

But as your wonderful suggestion, curation reward share is needed in order to incentivize whales and to support curation guild operation. E.g. a whale delegates his voting power to a curator of a guild, and the curation rewards are shared 1:10:89 among guild:whale:curator.