Something about god mode maf, if your species is reliant on the wormhole system of travel, and you have god mode active, destroying enemy wormhole stations is impossible as they seem to benefit from god mode as well. Other than that, the previously mentioned problem of ships under god mode having insanely high maintenance requierements is present. didn't run into the problem of it only working on some ships in the fleet.
EDIT: also planetary construction (clearing tiles and building planetary buildings in them) is still slow as molases, if you could try looking into that it would be awesome
