I always found Deadeye to be damageable to the game since it basically removes one interesting aspect of the game (same as repositionning high PS aces that somewhat negate the importance of the dial). The problem with ordnance is not the TL, but the amount of damage that was too low.
But in the other hand Deadeye makes for a good EpT for a single specialist (and fluff-wise is really good with that "Luke not using his targeting computer" thing).
So I vote for making it Unique.
Inability to make R3 shots (exactly what ordnance is supposed to do)
against a target with higher PS is.
Ordnance had the following problems, each addressed making it useful in high-end gameplay
1. cost. addressed with extra munitions, making 4-point torp a 3-point torp(already nicer)
2. taking of TL on higher-ps enemy, because taking R3 TL means a 3-4 move (even without a boost) means he gets into R1 no problem. (addressed via Deadeye or LRS)
3. spending of modification for firing (addressed via Guidance chips or newer ordnance that doesn't spend tokens)
4. inability to choose target and utter uselessness against arcdodgers who can woop-woop out of your arc, when you took the TL (adressed via Deadeye)
so, take anything away and you leave ordnance a useless wreck.