There is no enough space on F22 for 16 SSMs. However, putting so much AsM assets on platform is also wrong. This is suitable for Russian/Chinese Saturation doctrine, where two or four missiles are fired on each target in ripple fire to overwhelm the defenses. Our Navy follows the wester Precision doctrine, where one missile one target is the norm, or there is coordinated attack between various assets towards a unitary target to overwhelm its medium and terminal defenses.
In hind sight, I would recommend that Navy consider installing indigenous anti-ship cum land attack missiles on its platforms, giving us more flexibility at sea for regional interdiction, defence and dominance.