Parliament closes for the holidays; this is normal and traditional, and nothing much happens while parliament is prorogued.
But the idea of proroguing parliament so that a government can push through an action while parliament isn't sitting, is very very bad.
In the British Constitution, parliament is sovereign. At the top of the tree. The main thing. If a government deliberately prorogues parliament in order to take an action, then they are doing so because they know that if parliament is sitting, then the action would not be allowed.
This is called a coup.
This is how the Roman Republic became the Roman Empire; instead of the Senate being the Main Thing, it was Julius Caesar - until he got milkshaked. And then it was Augustus, and his successors. It was the end of the republic. And this is also how the Nazi party converted a majority in the Bundestag, into a permanent dictatorship. It's the sort of action that one might expect in a banana republic.
No party should be allowed to do this, and I would hope that no-one will even try, because the fallout from such an attempt would make the current ding-dong over Brexit look like a food fight at the vicar's tea party.