If the Democrats turn three Senate seats in the 2018 elections, they can undo the nuclear option.  Fat chance of that, though.    

 "It threatens to reduce U.S. democracy to majority rule by cutting off both debate and discernment. While the opposition sits back silenced and silent, the ruling party will run the country."

And there is nothing democratic about a filibuster, or about requiring more than a simple majority to confirm appointments or pass legislation.  Democracy (at the Senate level) is by majority rule.  That is the system that the founders founded.  Don't like it, then elect more senators to your side of the aisle.  But don't disparage it as being un-democratic when the majority flexes its muscles.