Considering Crossbows are the only ranged weapon that can be used with NO skills other than WPF, they can be aimed for an indefinite period of time, and they still do more damage than archers, I don't see the problem.
I have 122 Xbow proficiency on my main, I use the heavy crossbow with steel bolts... I have NO problems getting kills... In fact I get WAY more kills than on my dedicated archer character.
As far as the Siege(Sniper) Crossbow goes, yeah it got a huge nerf, but so did the Flamberge, So did the lolaxe. These high tier weapons now take a special kind of patience and skill to use, and they are not necessarily "better" than their less costly counterparts, just different. Slow, but powerful - not too powerful, but still very strong. I like the change.