Thoughts on the new tax system
After much gnashing of teeth and pulling of hair, I've decided that I like the new taxation system.

Not getting census taxes from provinces that have no tax collector makes it just a little bit more difficult to profit from warmongering. Non-culture, non-core provinces are now going to be revolt bait for the rapacious warmonger bent on conquest. Build taxmen or get nothing from your new conquests. I love it. Any change that makes it more difficult to for the player to expand beyond the historical boundaries of his nation is a much needed enhancement.
But... and you knew there was a 'but' coming here... I'm a little concerned about what this change will do to the nations at the start of the grand campaign.
As Peter has pointed out, most nations are going to have very little trade or production revenue at the start of the game. This low income, coupled with the often too-large standing armies, may make it very difficult for nations (AI and human) to even build their starting economy. Particularily nations that start the grand campaign in wars.
While it isn't going to be much of a problem researching infra 1, and most human players will manage to build tax collectors one way or another, I'd still like to suggest a few small changes:
One of the following:
1) You always get census taxes from core provinces you control
2) You get 50% of your census taxes without a tax collector
-- or better yet, combo the two of them --
3) You always get 50% of your census taxes from core provinces you control
I hope Johan and company will consider one of these modifications, I personally like number 3 the most. I also am looking forward to some detailed explanation of how the new deflation system actually works.
Cheers.