Tomas is right. We can discuss about power of sniper crossbow (there will be no point in using heavy, when it will take 2 slots ;) ), but the fact is:
Sniper crossbow hardly can 1shot someone. To 1shot someone we need:
- target has to stand still next to us or run towards us;
- target has to be naked (if standing still) or at really light armor (if running towards us);
- target can't be str build (if target has more than 70 hp, naked guy standing still won't die/if target has more than 60 hp, light armor guy running towards us won't die)
- some of factors above may be not needed, if we have heirloomed sniper crossbow
- it can't rain, otherwise all the shoting is shit (not because bolt flies soooo slow, but because bolt flies SOOOOOOOOOOOOOOOOOOO sloooooooow if compared without rain. all the training without rain doesn't help you if your bolt flies in different way on battlefield)
Well...
"Nerf sniper crossbow", huh? If we can't use proper melee weapon with sniper crossbow from next patch on, buff sniper and heavy. If sniper needs 2 shot, I believe heavy needs sometimes even 3 shots -.-