Jaraxxus over Leeroy in terms of crafting priority unless you truly love Face Hunter.

Handlock might not fit meta perfectly at the moment, but it's just like Ramp Druid or Control Warrior: it will always have a place in competitive. And it can always get you to legend.

I personally find FH boring because there's very rarely any decision making. So I wouldn't main the deck if I had interest in becoming a better player.