Auto-Eject will automatically eject the player from the doomed Titan briefly after reaching the doomed state. The pilot will also be cloaked, regardless of the player's ability.
With this kit, player simply can't die in his titan (In some cases can die). Titan is immune to damage and execution until pilot ejects, even if titan is doomed in the middle of executing someone, when ejection via standard means is not possible. While in the elevated position of (relative) safety, the pilot can plan his/her next move, possibly even rodeoing the titan that doomed the user's titan.
Being doomed does not mean death. Often enough you have a chance to doom your enemy as well and Auto-eject removes this possibility. If equipped with Nuclear Ejection, you can die if ejecting under a bridge or in buildings, because you can't disembark to prevent being killed by your own titan.