3 AP crossbow does seem like too much for how little the damage seems to be improved vs. a bow of the same level. I think it's a good direction, but, may need more tweaks. Could be cool if crossbows had some kind of 2 AP melee bash, maybe with some crossbows coming with bayonets.
Leadership is much more interesting I think, since you actually have to consider your positioning, though I do think its range is a little small. Maybe 7-8m would work.
I general, I find the ranger skills kind of boring. Mark target especially needs some love. Maybe could use something small, like everyone can always see the target, even when blind or they're behind smoke, or perhaps even make it neutralize invisibility. Slightly unrelated, but I hate how ricochet and the piercing shot can hit neutrals.