You seriously think Apple would have sold as many iPads if they sold it with iOS 1.x version of the browser and no email client, purely based on experience? I don't think so.
So again - our debate here is about price, features and experience. You can change the order but I think excluding any one or more thing at $300 is not really a good thing.
And you and me can argue to no end that it's not Android or it doesn't really matter that it's Android - but Amazon has an "Android" App Store and they sell apps through that and people are going to be expecting to see some apps that they won't either due to them not being compatible or not on the Amazon app store or in the best case just not working good enough due to running on an older OS with deep 3rd party customizations.
And upgrades being nearly free for Amazon - It's Google's code, they just have to rebase and deal with kernel/hardware bits just like every other vendor. The customizations probably are all Java and easily mergeable atop newer AOSP releases - if they aren't then that's bad news already. But let me be clear that even if it wasn't nearly free - as a user I don't really care - I want a reasonably secure and updated OS with no artificial limitations if I am paying $300.
Prove it.
Walk us through the level of customization Amazon has done here, explain at a high level the goals and tradeoffs they sought in forking Android, and show how the product would have shipped on-time, for the holidays, by making the simple change of completely replacing the operating system they'd already spent so much time to customize.
I really don't think you're hearing me, here. This isn't an "Android tablet." This is Amazon's Kindle, which will succeed on its own merits, and just happens to have some deep technical underpinnings in Android.
This isn't about the specs. This is about taking some raw material and shaping it into something that meets their goals. They've done that. Can it be even more impressive? Always. And I'm sure at some point they'll merge in a bunch of the technical junk that only 0.1% of their users care about, in the furtherance of the experience.
But I think, out of the box, they're already going to be heads-and-shoulders above their "competition," such as it is.