I seem to have gained a reputation among my players for running tough-but-fair encounters. I stopped using screens a while back because I don't want the players thinking I'm fudging anything. In fact, I never fudge rolls -- if the players are in over their heads and I believe it's my fault, I'll have the monsters make tactical errors (usually provoking more opportunity attacks). Of course, the flip side of that coin is that when I believe the players are dying because they've been foolish or careless, I'll go ahead and kill them.
I feel that when they can see I'm not fudging rolls, it's vastly more satisfying overall.
And, of course, the best thing about 5e is that you seldom need to look at charts. In fact, I'm curious what they'll put on there that they think will actually be helpful.