I think a further irony of this name change back to Manor Farm is that it seems, just as in Russia during the reign of Communism, times were getting even worse than they were during the end of the Romanov family's reign. Just before the revolution in 1917, Russia had indeed gained a Duma (Parliment), a Constitution, and serfdom had been abolished for quite some time. Things were getting better. With the onset of Communism, things were allegedly supposed to get better and better but got worse and worse.
This is the same case for Animal Farm. At least when Jones was in control, they ate most of the time. Only at one point did we see him completely neglect the animals.
The entire irony of the book is to show how the start of a new order fixed nothing, in fact the exaggerations are to demonstrate that it made things worse.