I don't think the rich getting richer is a problem in the short term. It just should not stay this way in the long run.
Why do I think this? In the last year, whales and orcas lost a combined 25% in terms of steem holdings to dolphins and minnows. That means reverting this change will not be a problem in the short term (1 year). 
Taskmaster and others have shown countless times that the distribution of steem was working under HF20 rules. Tomorrows changes might revert this, at least in the short term.