I agree completely, it is so hard to be a scout or a sniper when your position is given away so easily. It is fine if its the sun's reflection but otherwise it is insanely difficult to be a sniper. Personally I think the scout should be better at hiding to give a better Intel of the enemy movement or get rid of (attempt) squads trying to flank allies but as soon as you aim all guns are shooting at you.
The scout's ability already gives away positions so is it really necessary to have it. If someone gets sniped they can use the mic or chat box to let them know so for previews games it has been pointless to change location after shooting since having the terrain advantage has more benefits rather then covering key location cause you are the first to be spotted.
Please I hope this can be fixed on this game. But the glimer of light should stay when the scope gets hit by the sun. It should give sniper a more immersive experience but I would also feel like I'm not giving my squads position everytime I aim