To emphasize heres some of the forshadowing

Cookie cat has two different eye colours which unlocked his first power

stevens next power was unlocked when destroying a giant eyeball

STevens “battle damage”

The foe that got closest to killing him was eyeball ruby who only did so because pink diamonds plan worked too well

Cat steven is missing an eye

And finally, pink diamonds first pearl lost her eye to pinks tantrum

All im saying is that there was a lot of eyeball damage forshadowing that never got any payoff