I think some people are reading too far into the numbers he posted. They're just ideas, SE can balance the rest.

Imho go ahead and make super hard fates, that dont die in 10 seconds. Make them live longer and give them actual
good drops. Make drop rate based on who gets claim, and rating at the end. Get claim? party gets 2% more drop rate
Gold? 20% common drop 5%rare drop
Silver 10% common drop 2% rare drop
Bronze? 5% common drop 1% rare drop

Do those numbers matter at all? not really cause SE can change them to w/e they want to be balanced.