Atmaca is, by all estimations, just a Turkish Harpoon equivalent. Nothing overly special or unique, just another step taken by Turkey to lessen its reliance on Western (mainly the United States) suppliers.
For Pakistan is could be an attractive option as a one-to-one replacement for their older Harpoon missiles, especially as Atmaca could easily fit on the F-16 or even be mated with any ship outfitted with Harpoon or MPAs like the P-3C. It's just overly redundant and that's the main problem Atmaca has. It's another C-802/Harpoon/Exocet-class missile and doesn't offer anything to Pakistan that existing alternatives don't. It's attractive for countries that want a close defence relationship with Turkey.
What would be game changing would be a surface launched SOM missile. That would given a Navy a small, stealthy and highly capable over-the-horizon anti-ship/anti-surface weapon that would be almost unique. Currently only the NSM fills that niche.
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Atmaca is a great step for Turkey in its efforts to modernized and standardize and lessen its reliance on foreign gear and suppliers, but ultimately for Pakistan it's just another redundant missile unless it's procured to replace Harpoon and other similar types in a modernization/standardization push.