The "100,63" thing, remove them. It's broken. Maybe not for the beginners but as you get the hang of it it turns into an insanely useful tool to land every shot you like. This is neglecting the strategy aspect of the game dramatically. On the other hand, add decimal units to the angles and power, so "100,80" should be like "100.36, 80.01". Why? When you tap the right or left arrow key, it moves by a single angle unit. This will make the first change useless, therefore make it less vague so nobody starts using rulers. If this is implemented then maybe the game will have some sort of a skill gap between players.
While I personally don't use the numbers much, I believe that people have a right to those. Instead of flat out removing the numbers, I think there should be a mod (which can be combined with others, like one weapon) which removes them. That way, we can have games where you get more xp by not having access to those numbers.
Making this idea into a mod could be healthy for the game. A low level that doesn't use angles and numbers could turn it off for some extra xp and give high levels a little more challenge to boot.
Just remove it completely. In fact, trash this aiming system and make a new one and remove numbers in the process. Some people have been making rulers, and if we reset everything, they'll be screwed. Yes, SSundee's videos were just trolls, but there are some real users who made some for a real advantage. The worst part is they take little to no effort at all to make. After this, it would help if one press of a key wasn't immediately a 1 degree change in angle. It would screw those ruler-using jerks even more if they are trying a precise shot. I agree, these numbers have to go, but more has to be done to improve the game in that aspect.