Make the line optional, I hate it, it is annoying that it stays on view when you are changing the line and I am sure that the putting is more prone to bend if hit even slightly off the perfect spot.
Why WGT thought it was a good idea to have a putter that mimics a shot with an iron or a wood is beyond me. In the real world, it is very rare to hit a shot that veers off line. A putting stroke is the easiest to hit, the skill comes on getting the correct line and distance.
Another thing they should sort out is the flop shot. Why does it automatically pick the wrong distance club for the shot and a flop shot should flop not fly past the hole on a low trajectory. I wonder if the developers play the real game. How many times do you hit the pin on a slow running chip or a putt from off the green and see it ricochet off the pin. Playing real golf, I putt and chip with the pin in and I would say that 90% of the time that the speed is slow, the ball will fall in the hole.