The game would be a lot funner in terms of personal enjoyment if it was. Neena is overall the funnest Navi. The rest are all kinda generic liner speakers, and don't really stand out from each other. At least as far as the females go.
THe males are more varied a bit, though there's only like 2 or 3.
Atra's being added in soon from IBO, so hopfully she'll be fun.
Sadly, the best navigators in the franchise are the 4 evil Sthessia's, and they're mostly Exa Exclusive to the Extreme Versus series. They COULD come to Versus with original Sthessia's mahou shoujo Lyrical Excella gundam, and Extreme Gundam DLCs, but probably not until long after they run out of stuff, or most likely the sequel.
Loving the Excellia. To put it blunt...It's literally goddamn Takamachi Nanoha. It even has Accel Shooter, Divine Buster, and full blown magical circle barrier, and probably Devine Buster in there somwhere.