I have an idea that may just solve the luci problem!
Make barricades luci-proof!
This might lead to bari-blocking tho and if implemented, you might have to make the cades lower when aliens are touching them, liek in 1.2 (i thinks?)
It would give an actual use to baricades, make it difficult to kill things with curving luci without unbalancing the game w/ advanced tyrants, and be awesome.