I'm sorry, I'm breaking the rules.
I can't seem to settle for one request, when so much is badly in need of adjustment.

Adjustable Zoom Scope -
There is too much data clutter when you are scoped in on a bunch of friendlies and/or hostiles. All the bars and data is blinding. If we can adjust our zoom, this situation can be addressed.

Eliminate Weapon Sway While Crouched -
Why does my merc have to throw his weapon around every time he scopes in or moves his toe even a smidge? We're fkin already crouching... Why do we need so many stacking handicaps? If we could crouch and get a shot off without having a seizure each time, you might see more of us move in closer to the action. We won't need a bipod.

Reverse the Weapon Profile Change -
This one really kills it for me. It's annoying to even type about, because it makes little sense. It's really hurt tactical sniper rifles in a bad way. Put the 10% damage vs. shields right back where you took it. In fact, I'd prefer a bias AGAINST shields. 110% vs. shields. For a sniper, the opening shot is everything, because every follow-up shot against an alerted target is increasingly difficult. It makes no sense why railgun snipers received such a penalty, and no alternative sniper rifle with potency vs. shields was offered as a caveat. Poor planning.

Target Painter -
I shouldn't have to be squad lead to be able to mark a target with a red attack indicator. If I'm able to generate a simple attack indicator, that would be better than, "Behind you." or "Just around the corner ahead of you." I want this, because the red chevron just does NOT light up for everyone in squad sometimes. Apparently you often DO need to be squad lead, in order to mark a target.

Prone -
Yeah, we need it. Will we ever get it? No.

More Weapon Variants -
"Breach Sniper Rifles" with effectiveness in the 100m-200m range would be nice. A sniper rifle we can use more like a heavy tactical assault rifle. Anti-shield sniper rifles. Laser sniper rifles. Pulse laser sniper rifles. Burst sniper rifles, with a charge-up mechanism. Get rid of the monotony.

Dropsuit w/ Sniper Bonuses -
Sentinel's get a reduction to feedback damage, and increased heavy weapon reload speed. Minnie Scouts get +5% to melee and NOVA KNIFE damage (a dedicated weapon damage buff). Every role gets something that works for them, or helps a dedicated role. I'd like to see snipers get a weapon damage buff, OR a sway cancellation buff, OR a huge boost to scan radius and precision (for the ranges that SNIPERS operate from).

+1 OP.

But a pointless thread. I have faith the size of a mustard grain that someone at CCP will care about niche roles.

BULLET TRAVEL TIME so you have to lead your target and actually have skill

What annoys me more are the tower snipers. CCP really should have put a stairwell/ladder up to the top of those places so everyone has access to those places, whether to snipe or kill someone who is sniping.