I'd like to agree with you but nope it clearly does lack detail, looking at that page I've a few instant questions
* If I'm a business how do I get my VAT right?
* What goods/services are VAT exempt
Now they're a little specific because I deal with VAT regularly but the fact that the VAT rate is 20% is easy to show and it's a headline piece of information. However tax and everything else involving government is always complicated and presenting it simply is incredibly difficult. The questions that a user landing on that page will want answering are diverse and as much as I'd like it to be as simple as showing a simple table with some data I doubt whether that's going to answer the question the average user has. The current directgov page is full of links to and information that might help, the new snazzy page - nope nothing.
I don't think this is purely political I honestly believe there are people trying to make government sites more simple but I also don't think just throwing away whatever information you don't need is not particularly helpful. The reason most gov websites are hugely complicated/confusing is because gov is hugely confusing/complicated and while I applaud any effort to simplify the presentation simply dropping a bunch of information and claiming you've solved the problem doesn't cut it.