Does it look incomplete on screen, in a printout or both? If you are viewing at View>Display Performance>Typical Display, try High Quality Display. That won't change what prints, but Typical is just showing you a low-resolution preview that is good enough for most placement needs, but not the best. It's really a trade-off between how good the image looks on screen, and how fast the screen can adjust to movement, so if you're scrolling/zooming/moving the image, it will go faster with Typical than with High.
In addition to Michael's comments you should be aware that EPS is pretty much an archaic file format. If you are creating these files yourself you'd be much better served saving as AI or PDF and placing those.