This will be my last response to this thread, as people are justifiably getting annoyed with my argument with Tunderhill, and as he is incapable of understanding any ideas but his own, so assumes anyone who disagrees with him must misunderstand and keeps repeating himself.
I would like to consider two ideas: changes that are heterogeneous to the intention of a device or system vs. changes that are consistent with it, and another possibility for the delay in implementation of obvious features.
Tunderhill keeps saying that wanting to delete single files from PS is like trying to drive a nail with a cell phone. If that were true, no one would disagree with him, including the tech people responding here. That metaphor, which he doesn't understand, describes a change that is heterogeneous to the design of a system and is the point of the metaphor: at no point in the future will any cell phone ever be developed that can hammer nails. Why would anyone build such a thing? A heterogeneous change will never be implemented.
A change consistent with the intention of a system or device, however, could be implemented at some time in the future. Since Tunderhill also asserts that the ability to delete single files will probably be implemented at some time in the future, he clearly does not mean what he says by the use of that metaphor. What almost every user would like to do is manage their files individually. It doesn't matter if the system is designed for storage or to push files between devices -- that is still what we want to do. And, by the way, whether the system itself stores files or just pushes them between devices is irrelevant: it is still all about storage and user control, whether the storage is in the cloud or on the device (both in this case). This change is perfectly reasonable, and yes, will probably be implemented at some in the future. I hope by next week. It doesn't matter that we can work around it now (I have). The workaround is awkward and stupid. It is not what we expect from Apple products, which are supposed to be more intelligent that that.
I will say the PS concept itself is indeed very intelligent.
Now I have no idea how things are run internally at Apple, but I do know how other businesses are run. Most businesses are run on a model in which you have producers who develop and produce a company's product, marketing people who sell it, and administrators who have final say how oversee the process. In most businesses (that are run in a poor or mediocre fashion), administrators listen to marketers and are annoyed with the limitations imposed by producers, while producers are reasonable and intelligent people who want to put out a good product. The history of this relationship is found in Dilbert. Doesn't matter if the business is a school, publishing house, or tech firm. Things usually run this way.
So it's very possible that the developers at Apple had a whole host of features they wanted to roll out in version 1 but marketers or administrators didn't want to wait for them. If that's the case, then all the annoyed posts on this thread can be compiled by Apple developers to use to beat marketers over the head and say, "we told you so."
But I also know that Apple, at the very top, is run by developers, so may be working on a different model. I really don't know. Seems like a better run company in general, but I don't know what internal dynamics guide the development and release of a product.
Anyway, we have asked for this feature. Let's see how long it takes them to give it to us. I want to use it. I won't continue to use it for long until it's a bit more sensible. But, it is a new kind of thing, so I'm willing to give Apple a little time. They've served me as a customer very well in the past and have earned quite a bit of loyalty.