There is no "playing on servers without laggers," it doesn't happen, or exist, unless you win a lucky roll of the dice. Since your connection has to be established with every individual other player the only way you'd avoid that kind of connection issue is to invite everyone you want into your server yourself with no public players. The guns may be 'balanced' but they are also quite boring. Submachine guns are solid enough that no one need ever switch weapons. Twitch weaponry like the rail gun or the canon is rendered nearly purposeless due to people clicking in and out of invincibility because of connection issues and these weapons seem to 'arc' when you aim them at the ground, making the canon worthless unless you hit someone directly or fire at your feet.
The skills are interesting if only totally limited and broken in application. Two guys in the tunnel leading to a ball capture point with the 'wall' skill make it impossible to earn any points.