I was looking at something with the GOP would get with GA seats and settle in at 51. But if it is heavily looking like 48-50 then GA will be a blood bath between now and January 5th. Republicans will do everything possible to stop cities from voting, and drive as many rural voters to the polls as possible. And on election day Trump Trains from in and out of the state may block access to voting places in the cities on election day. Yes, very ugly.
If it ends up 51 R to 49 D, then McConnell keeps the leadership and nothing the House and Biden want gets done. And nothing the Rs want get approved by Biden. The best result is 50-50 because then the Senate operates in the more civil manner where ALL legislation get a floor vote. In fact, that should be the hardcore rule. Why a single person gets to decide what is voted on is not what the Constitution called for. That needs to die. And they way it must die is permanently operating the Senate under the 50:50 rules, whatever the Senate split is. if it was 40 Republicans to 60 Dems, the leader of the 40 Republicans could always call for a floor vote with the leader of the Democrats not being able to stop the vote. Much more civilized, and a chance for the minority party to create legislation that is more balanced and can attract members from the other side to vote with them.