I'm seeing a distinct lack of Unlock Dragonmark +
Unfettered Heroism notation.
Actually, make that a lack of
Unfettered Heroism shenanigans overall.
Gaining an AP per round, allowing you to use all those AP-cost Dragonmark Feats, is really good.
Just take a look at all the blue feats you listed and imagine them being used on a round-by-round basis.
With Unlock Dragonmark, you can spam your abilities to your hearts content, as long as the spell is active.
Access to multiple Heal is my first thought, but that's just one option.