In fact, if you think your sweet spot PC would be attractive to a lot of people, you could set up a company and market it yourself. There are hundreds of factories in the Pearl River Delta capable of producing that sort of thing at a reasonable price. Kickstarter here you come?
That's the real hope of Surface--to free us from OEM's and their OEM crapware and OEM brain damage. Microsoft has a lot of money, but even it can't buy the Chinese/Taiwanese OEM's taste.
There is just a powerful marketing pitch in being able to sell a product "this is the one true way Windows 8 was meant to be experienced." There is a reason everyone raves about the Nexus 4/7/10. Surface is the only Windows 8 tablet on the market that can go toe to toe with Apple in terms of industrial design and vertical integration. The success of Windows 8 tablets lives and dies with Surface.
However, your point on crapware is well made. Unfortunately, Microsoft can't do anything about it (because the DoJ sued it into the ground and specifically prevented it). Also, crapware brings in money and this is significant in a market that buys on price. I don't see it changing in the near future.
The problem for Microsoft isn't that Surface Pro isn't a good pen tablet. It's that 98% of people don't want, or don't know they want, a pen tablet. Now, before the iPad, 98% of people didn't know they wanted a tablet. That's a fair point. But in the last decade, Microsoft has demonstrated zero market making ability of that kind.
On top of that, Surface Pro is probably not the ideal pen tablet for current technology. I think a cheaper, lighter, thinner device with a Clovertrail processor, digitizer, and 8+ hours of battery life would have hit the sweet spot if Microsoft wanted to make a serious go at making pen computing happen. My guess is that the battery life is going to lose them a lot more customers than the extra oomph of the Ivy Bridge is going to gain them.