Thanks a lot! I also consider that, most of the time, a fully defined NPC isn't needed at all. Not even with such a simple system as yours. For example, I simply need to know that if they want to evade a "not-too-smart bouncer", they can roll without modifiers. A "sly ghoul" might give them a difficculty of -1 die. And a Nosferaty with Auspex will make it a -3d roll. Not even stats for those NPCs are needed in how Perceptive they are. But yes, I was curious to know what dice pool ranges you would consider for the enemies in a confrontation. Like if I want to make an opponent dangerous, should I roll 3, 5 or 8 dice? How much is "too much" and how much is "too short"? In general terms, I imagine that a human should be between 0 and 3. Vampires could go up to rolling 7 dice, as you said, in very unique situations. Also, Health for a human I'd start at 1-3 range. Vampires could even have more than 6 for really tough individuals.
All in all, I've liked your system a lot. Two friends, long time directors of Vampire, have also read it and wanted immediatly to try it running an adventure. Great, great job in how you managed to take what is really important about vampires in the game, and leave out the rest that is just mechanical mess.