Or they are trying to sell it to existing Traveller fans who, probably correctly, assume that they will have a mush easier time getting players if they use the system from the most popular RPG in the world. RPG's, like computer software, have network effects - the more people play your game/use...
If it was me I would say that Gargoyles are Warforged, and decide what, if anything, to take away from them so the flight speed doesn't make them too strong. Maybe a "Winged Warforged" subspecies would cover them both?
As far as a hook goes, If you skip Lost Mine and start the party at Level 5 the hook could be "These are the people who are giving you the land for your Bastions. If you want them, then you have to live there."
They look a lot like Warlocks but with no spells and many more Invocations. Then there needs to be a Feat anyone can take that gets them one of those Invocations so they can also be Psionic as a side-hustle.
The rules say that potions weigh 0.5 lb. Does it really seem likely that it is 1 oz of fluid in a 7 ounce bottle? Does it seem likely that they're so much thicker than water that 1 fluid ounce weighs much more than one ounce? They seem to be in the four to seven fluid ounce range.
It makes sense that applying a Potion in your hand is a bonus action. Their weight tells us that they are only a few ounces of fluid, so they should be chuggable. However if that Potion is not already in your hand it will take an Interact to "draw" it. Also, if this is your buddies potion he had...
What if there was one new class per year, in a book about a setting that features that class? So 2025 = Eberron = Artificer. 2026 could = Dark Sun could = Psion. 2027 could = Exandria could = Gunfighter. 2028 could = Dragonlance could = Warlord
The way around that is to only spend force points to save the other characters butts. When Luke and Leia were running from the DeathStar Stormtroopers they didn't spend their Force Points to save themselves, they spent them to save each other, which is heroic, so their GM gave them back at the...
Taking your first level in Fighter rather than Rogue would get you 2 extra hit points and more fighter features. Given that Figgen will have more levels in Fighter than in Rogue this seems like a good idea. I would take the Wayfarer (what 2014 called Urchin) Background so that he has more Rogue...