you still get the grant, but it is being paid over the three years instead of in one lump. it will have cash flow consequences, but if you are a member of IFA, you will have had communications on this and it is well flagged in the agri press.
As vanilla says, if you are not happy, you can take case against Govt, butthe costs if you lose, would probably mean the loss of the entire farm.
farmers are not being singled out. There is no money in the kitty and ALL suffer to some extent.