Just out of curiosity, what polishing do you think needs to be done to the new OMD?
Less damage.
How much so is up to debate.
Yea, basically they have the attack power of a Mk. III anti-arachnid post, but combined with a much better range and an only somewhat low chance to spawn (as opposed to quite low like Mk. III forts and counter-spies and munition boosters and the like) sort of pushes them into OP territory.
At least one of those things (damage, range, or chance to spawn) needs to go down.
As chemical_art points out which stat or stats need to go down, and by how much is up for debate.
(Also, I still think the new guard posts could use a slight bit of a vs. bonus nerf, and the anti-arachnid guard post needs a bit of a nerf as well, but probably not as critically, as most of the guard posts can at least be avoided until you are ready for them)