I'm a little confused about how reach works for large ancestries in SF2E: in short, do large PCs have 10 foot reach, or not?
Per Player Core pg. 418 (https://2e.aonsrd.com/rules/427-range-and-reach),
"Your reach is typically 5 feet, but weapons with the reach trait can extend
this. Larger creatures can have greater reach; for instance, a
crest-eater has a 10-foot reach."
So nothing definitive there. Similarly, the "Size and Reach" table on pg. 414 (https://2e.aonsrd.com/rules/407-size-space-and-reach) says the reach for a tall (bipedal) large creature is 10 feet (again, "typically"). In PF2E, large ancestries don't get extended reach unless given by another source (Howl of the Wild, pg. 9; https://2e.aonprd.com/Rules.aspx?ID=3270): however, no such rule exists in SF2E as far as I can tell.
Two ancestries, the Sarcesian and the Shobhad, get feats which allow them to grant the reach trait to two-handed weapons as an Interact action (e.g. https://2e.aonsrd.com/feats/186-large-reach), similarly to how large reach was treated in PF2E. However, the Dragonkin gets a feat which suggests that large ancestries have innate reach (https://2e.aonsrd.com/feats/133-size-of-the-ancients):
Size of the Ancients
You undergo a rapid physical change, increasing in size to rival dragonkin of the ancient past. You grow to size Huge. Your equipment grows with you, but it returns to its natural size if removed or dropped. Your reach increases by 5 feet (or by 10 feet if you are a shipborn dragonkin), and you gain a +4 status bonus to melee damage. This transformation lasts for 10 minutes. You can end this transformation early as a single action that has the concentrate trait.
Specifically, your reach extends by an extra 5 feet if you are a shipborn Dragonkin, which is medium. This leaves us with two scenarios:
1. Large ancestries (like most Dragonkin) have innate 10 foot reach, and all Dragonkin using Size of the Ancients end up as Huge creatures with 15 foot reach
2. Large Dragonkin using Size of the Ancients get 10 foot reach, while only medium dragonkin get 15 foot reach.
The former seems more reasonable to me (that the 5 foot bonus is meant to compensate for a shipborn dragonkin's shorter natural reach). Under this reading, the Sarcesian and Shobhad feats are meant to widen the pool of reach weapons, rather than provide a proxy for Large reach. This may also explain why Dragonkin lack a "reach feat", since their signature weapon (the dragonlance) already provides it.
Does anyone have additional insight? Am I missing or misinterpreting something?