I think if the ostheer sniper got any buff, it should be to its time-in-camo when moving between cover. The issue most people seem to have is the balance compared to the soviet sniper; allowing the ostheer sniper more freedom of movement would make counter-sniping even easier.
I think this could go a long way. I have always been a big fan of Soviet snipers, but have recently made it a point to get a German sniper of my own. I have been attempting to use the german sniper to counter-snipe the soviet snipers. In cover the German sniper cloaks fast enough to counter snipe. The hardest part of this attempt is getting close enough to the soviet sniper without giving away my position. Given the scarcity of cover on some maps, it would help a lot to be able to sneak in there and take some shots without being completely exposed on the way in. A very small increase in how long the cloak is active would have a large impact.