On my two characters that are playing around with the shipyard I've encountered a big roadblock. My little fleet is fully purple but the mission map is full of nothing but meaningless XP missions. I get maybe 1 or, at most, 2 missions a day that actually reward anything useful. Sometimes I'll go 2 days without a single treasure mission.
I'm putting minimal effort into shipyards but it's depressing to see how untested, poorly thought out and un-engaging they are.