1. Droptank collision is wonky. Jettisoned tanks can get trapped inside ship's armour layers sliding around and causing continuous damage.
2. Payload on (unjettisoned) droptank collision typically results in CTD.
3. Droptank jettisoning in combat generates tremendous amounts of lag.
4. AI seems to try to dodge droptanks even when not on collision course.
5. [suspected] Multiple overlapping tanks might actually be jettisoned per every single droptank. Clues are weird lighting on tanks immediately after jettison and one instance where 3 droptanks detached from a destroyed ship that only mounted 2.
6. Encountered at least one instance where jettisoning tanks during orbital burn and viewing enemy ship resulted in detached tanks teleporting into enemy vessel and piercing holes in it.
7. External tanks without explosive bolts are not treated as droptanks with regards to draining priority, even though they should because they are highly likely to be lost in combat.

Possible quick stopgap mitigation of droptank issues would be making AI not jettison them in combat, but they really need a proper fix.