Line of sight problems

Admittedly i only looked through 5 or 6 pages for a thread on this, so if i missed one i apologize.

It is as stated.
This game has line of sight issues.
New and old graphics don’t mesh will in certain points and gives you the thought of being able to shoot an enemy.
Obviously i know that something like this would arise from spot to spot, but not as bad as it is.
For instance at the beginning of truth and reconciliation when walking on the sniper ledge on the right, you can see two grunt sleeping right around the corner to the left, but there is actually a ledge there and you just end up shooting the ground and alerting everyone.
On halo when you run into the first squad of marines and the dropship. The right side after you fall down the little ledge has some pretty bad sight issues. Was shooting a rock for quite a bit.
And on Silent Cartographer, quite a few of the trees give you trouble when trying to shoot around them.

I don’t have to much of a problem with these on lower difficulties, but higher difficulties or when having lower ammo skulls on, every shot counts right?