Idea for a PBW game

[Arkcon]

I've got an idea for a PBW game. This will be the first one I set up, so I'd like opinions before I start.

In the grand tradition of using PBW games to try to understand the game better (you all know about Puke's Furball series, and Rautha's ankle biters), I've got a peculiar set of rules to make it interesting. I'm open to opinions on some of these.

The title will be "Holy War".

1). All players must take the Religious Trait, the talisman will not be disabled and everyone will have it eventually.
2). All tech's and alliances, trades, intel projects, etc. will be available.
3). There will be neutral AI's in this game. The rule is, if you share a border with them (or surround them), they are placed under your protection. You can't exterminate them in that case. Anything else, is fair game. Dominate them. Colonize their system or drop troops. Abuse the AI with trades. It's all your business. But leave them an independent planet. If you want to exterminate the neutral far afield, that's fine, the player next to them has the responsibility to come to their aid.
4). I'm going for role-playing encouraged, but not required here. Just follow the rules robotically or role-play your decisions.
5). I figure 3 planet, good, start. Medium galaxy, 4 players min, 8 max, no catastrophic events so neutrals don't die from natural causes, and anything else someone cares to suggest.