It would be pretty cool if you start as a Terran Bridge officer and build up all the way till you beat up the Captain and arrest him. Although, their would be 2 options... 1. You defect as a Terran Republic and start a civil war against the Empire or 2. During some fight in which you stumble across an anomaly in which you end up in the prime universe as a Terran Starfleet character.
Benefit of all this Cryptic? You get loads of mirror ships (Terran Tactics Mechanic or change stats to have new unique equipment), Event rewards, more Terran Empire/Republic uniforms, Terran Space/Ground Equipment, Terran Species Mirror Traits, and so on.
It also gives player an option to play a new Faction or Factions if you want to go with either TOS, 2409, OR Discovery Terrans it's up to you!
Maybe have Chase Materson be head of the story once again.