NOPE.
It is essential to the network that it is never fixed. That would remove the ability for the network to attract new farmers when space gets low.
So if FR is 0.0001 then that results in 1 coin per 10000 GETS then if farming rewards was transferred over to micropayments then each GET will give the farmer 0.0001 coins.
That is what FR (farming rate) really is “how much of a coin per GET)”