I was wondering, why do you get so many hit points when you level up? When going from level 1 to level two you always get at least twice as many hit points, often more. and you factor in CON twice. Once when making the roll, once as a flat bonus.

I need to play the game (will happen shortly) to see the effect in play, but I suspect that level 1 and level 2 characters playing together will be slightly funky. Which is bound to happen due to the asymmetric XP awards.

As far as I can see this is the only area where you get much more efficient when levelling up (notice the word much). Why is the curve so steep? Accident or by design?

(I do realize that a steep HP curve is a feature of oldish D&D, but never this steep, and this is perhaps not one of the features worth mimicking).