I do think that there's more to the process of becoming the Slayer, than just being a potential. Surely, you have to be chosen, not just next in line. Your touched by the divine, the champion of heaven. It gives you the authority to make decisions over life and death. Well at least in the demon world.
From the show, I always thought the girls were activated  by the stolen power in the scythe, which had to be finite. And not really drawing their strength from the real source of Slayer power, like Buffy and Faith. I haven't read the comics so I don't know if Joss explained that. But for me it always makes me wonder if they're little more than vigilantes.Food for thought eh. Loved the Spuffy.
 

Very nice. I think I still like the first chapter with its incredibly oily Drac (so much a skivver, a vampiric Arthur Daley) that you made quite memorable. But the whole story is a fine action tale, with good characterizations and excellent pacing.

At last, the vital 'Talk'. Honesty and trust, such wonderful things...
Intriguing thought, that all the newly activated potentials' slayer powers are somehow diluted. Makes sense...

Refreshingly frank conversation with everything out in the open - you've given me great hope for them this time.