BattleCruiserCommander Anti-crew weaponry would probably still resort to reskinned fire (given no new update gave the ability to add own 'kinds' of fire) and the slow moving projectiles are possible with OnDeath spawns (and inherited motion), but mines exploding in the direction they were hit from at least wasn't possible back when I still could mod for shit, guess there still is no way of automatically sending projectiles in a certain direction. Stealing a concept from Naval Vengence, you could probably have them spawn target seeking projectiles instead.
Edit: Forgot to mention that I stopped modding somewhere in 0.13.x, might be some stuff changed in between.