I'm playing a custom race with poor repair rate and dense ships. I thought that the extra space the dense ships attribute gives would even out the poor repair rate attribute. That is, avoid damage with extra defence modules so I don't need to repair after battle.
Turns out that's a horrible idea.
My armed survey ship (16,0,0 attack, 6-6-6 defence, 189 hp) only just survived taking out a pirate base (3,3,3 attack, 3,3,3 defence) with a single hit point left. So then it heals at the rate of 1hp/turn. Total estimated time to repair? 188 turns! Time to build the same ship again? 2 turns.
So repair is useless for me. It just makes sense to rebuild the ship and decommission the damaged one.
It would be nice if starbases could repair ships at the same rate they build. It would make ships feel less like disposable canon fodder. Especially survey ships which gain bonuses over time.