I honestly wouldn't have noticed the change if I didn't see your post. Since this is a big change and affects a lot of accounts, I would have wanted them to send a message or comment informing those who have some staked of the change [maybe something similar to hivebuzz].
Personally, I think the 20 percent is too good to be true. That's why I tried to put half of my rewards up to 1k. At 15 percent, I think it is still good, since I haven't seen any stablecoins offer anything close to 10 percent. But at these Hive prices, and the 15 being close to the Hive APR of 12, the HBD staking loses its edge. With just a small difference on the Hive APR, and with Hive having the potential of price appreciation, there is less and less reason to stake HBD. I wouldn't be surprised if accounts unstake their HBD and convert to Hive, while also increasing our current inflation/debt ratio.