There is no external build 7025.
Since installing an earlier build of Windows 7 (Technet subscription) I have only received 2 OS relevant updates. I have , however, like, I am sure, everybody, received a further 6 updates for hardware issues. This would,of course, depend on your particular hardware.
I think it is unrealistic to ecpect an update for every feedback lodged. Microsoft need time to evaluate the input and decide if complaints are hardware or OS specific.
I understand (I don't use it ) the media centre is a major source of problems. I am sure it is being examined and will be rectified in the RC.
" what incentive do I have to upgrade from XP to W7? A bit of eye-candy with less functionality?"
Sorry. No advice there. I could only ask what incentive made you purchase XP after Windows 98, without the opportunity (As with the majority of purchasers) of Beta testing.