I really liked Ilia, it was just such a shame that she never got much development in TMP other than the fact that she was Decker's love interest.
Having Ensign Ilia at navigation would have been interesting, given the crew a bit more diversity and opened up a new possible storyline--there is actually a woman onboard who Kirk can't bang for legal reasons!
That would then see Lieutenant JG Chekov as security chief...I wonder how long he'd survive in a redshirt?
Commander Austin Harris, First Officer, Deep Space Nine (by FltCpt. Bossco)
8.01 - Darkest Before Dawn
(Chapter 8 added, 12/09/2015)