So I was considering working on a set of supernatural gifts in the form of talents when an idea occurred to me that made me want everyone's input. Since having an Heroic Ability is pretty powerful, it might make sense to have a character with supernatural or super heroic powers use theirs as a gateway to spending on talents with a "Super" tag. Each level of Heroic Ability would grant the character the ability to increase their XP expenditure on the talents.

I think it would be a decent way to balance a pure-human character in a party with those with super powers.

Any thoughts, concerns, or suggestions?

I think the prerequisite works for creating a talent category. I would personally tie that to an archetype rather than a heroic ability. A player picks a Speedster or Vampire as their archetype and have the initial ability defined by that archetype at character creation. This would allow two Speedsters in the given example to have a different heroic ability and be customized between players. Another option is to keep the talents mechanical and strip out the narrative. Let's say you have a talent that allows someone to use a burst attack like a fireball once per combat that could be tied to a super hero archetype (or heroic abillity). You could keep the mechanical benefits of once per combat, ranged, blast damage and allow it to represent whatever theme matches the characters. It could be a high tech grenade for non-super characters while also representing a mental energy blast from a Super.