If you can't solve it logically, solve it like a moron.
51 + 1 Foundry Character Slots is NOT enough. Some of us love our characters. If I want to buy more character slots, why can't I? I couldn't experience the entire Delta Recruitment event without deleting a character.
The Iconians themselves can't time travel because their memories revert, but there is nothing to say an Iconian couldn't write everything she needed to do on a PADD, pin it to herself, travel back, read the PADD, do the tasks and return. Or just get one of her Non-Herald underlings to go back in time for her.
Want a Star Trek themed starship command fan-made Board Game that isn't fiendishly complicated but not so easy it's a joke? Download mine for free here.
https://roebot56.deviantart.com/art/BOARD-GAME-R56-s-Starship-Command-STAR-TREK-Edn-682732468 A Stargate version of the game is available from a link in the description.
Oh yeah, I do Foundry missions for both KDFs and Feds. Just search KSTF (Short for Kinas Special Task Force, where Kinas is the name of the Admiral you will be serving under). The earlier ones are less story based and more combat based, while the later ones have a much heavier story element, but keep the large battles.