Well aside from low-level accounts (Accounts with less than 50SP) somewhat being limited and being restricted on what they can do to the blockchain, one negative (and a major issue for me) that I see is how some business operating on Steem are affected greatly by this RC's.

I took a quick look at the account @blocktrades to which I have been using for months now to convert some of my liquid Steem/SBD to BTC to fiat and their Resource Credit is only at 6.27%. 

That is an account with almost 2 Million SP!!! I know how busy that acccount is on transfer transactions but I didn't know it would go below 10% days after HF20 was implemented. Now imagine other businesses operating on the platform with only hundred thousand SP's. 

So yeah businesses operating on Steem is very much affected by this RC as far as what I can see.