Bullet deviation to the left is an issue with the LR scope reticule (grid) not being properly centred:
They fixed it in the experimental patch (which is being tested right now).
Whether the scope is damaged or not has no influence on the accuracy at all, since no optics attachments have spread modifiers for any weapon in the game.
You can use a badly damaged LRS just as a pristine one.
My guess they will add a broken glass effect to the grid at some point as damage indicator. They didn't yet, because the LRS can probably support only one type of scope grid right now.
Edited by retro19, 27 February 2014 - 12:47 PM.