I think 5 good value planets are a bit too much. That's 5 colony ships a turn (with emergency build) for most people, without having to worry about running out of resources.
Score display between allies I think would be better. Score display all can be way too powerful intel. You can take a look at a guy's unit/ship production and see who might be preparing for war and stuff.
It'll be more interesting trying to buy information from one of your enemy's allies to learn stuff about your enemy's empire. Think of all the interesting things that could happen when you discover that your ally was leaking information to the enemy
What level treaty do you have to have for your score to be displayed when the game is set to display score allied? I'm hoping that scores won't be displayed when you just have a non-aggression treaty. This way not everyone is going to have a trade and research alliance (seems to be the most common treaty in games).
Oh yes I'll join both games - and more if you can think of any ideas